Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e31ae86d55a02f6…

MALICIOUS

PDF

102.8 KB Created: 2021-07-07 06:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8b21573a19f210449968c7eb206ccad7 SHA-1: 4804cc0c275b24024db05ba1745ace8baa58e0ad SHA-256: 6e31ae86d55a02f6dd62fdfc0181934111cca61f2ec7e4273d075589d8ceedb7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting, suggesting an attempt to distribute further malicious content. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synersys.fr/contenu/file/37100989037.pdf In PDF document text
    • http://busanpc1.com/upload/fckeditor/file/ragikoladi.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2144784e8---17285160207.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/bubkeian076ln3usmkrper9mci/73368027.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d579b03570---boziwufobejemupozujubi.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a70b3c82d9---83584538936.pdfIn PDF document text
    • https://asiabiru.com/contents//files/likesasi.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/023f4cd3c22eb77c2174490f8bb24c98/74876095813.pdfIn PDF document text
    • http://parfumkin.ru/files/files/zimejugobisipafome.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91c13def61---sakixefuvesap.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9fc7a4d81---18697853911.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/66876786927.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/976676f1232ad24f9f7776f1180ab93f/luvalor.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b69c5a9edfe---vizemuzuvif.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076108f5b73c---86052097852.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/d8bc3d49120f7c23f9378d71fb432d1e/89182418946.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/93171813441.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/14be699db5a50d8aa7f8cc02ed952d1f/30480446909.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba528a367d7---71386889366.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/a28910b10801eabf910d6e371e9c72a2/dudiwomi.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f9198c1ed---selabasedatobe.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/40d2a5754775fdbed953caf630321e28/sakuzekopusakesigivenowe.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d03959e216---81553997641.pdfIn PDF document text
    • https://anaksemut.com/contents//files/9149838560.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/nj1j4tg3kmm0ov9v5v63js5l24/41310090697.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/napaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=prodigy+brain+teasersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAC 17548 bytes
SHA-256: 7ecdcbea38fbefbac8c2690ed5cb2006bd72f41fc95cd679b540e89beef2a116
font_01_sfnt_off00013cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000154cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154CF 10632 bytes
SHA-256: 907fc86084cec8aab6e01c1f6124163479e320d0a520164e26baed21c7044ea0
font_03_sfnt_off00016d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D17 20092 bytes
SHA-256: f5178b744e10fd54556f9b5e7c7fce30a5159b32ebca11c08bef479c12adb056

Open this report in the interactive analyzer, or submit your own file for analysis.