Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e487849b9a3409c…

MALICIOUS

PDF

84.0 KB Created: 2021-07-13 09:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ac27fdb8a8e5f16b1504399f5c188aac SHA-1: 1e7b1176d841f1a8bcbd36cced55bdf4e111ff5d SHA-256: 3e487849b9a3409c88f76eeec75f113b74ec9fec62cfbdeb0fa1d2762830a8d2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. Several heuristics indicate the PDF is part of a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://ackerviewguesthouse.com/userfiles/file/nosutugolonukebabu.pdf In PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/letovafenimugasokifen.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c59528d1dcf---88030821866.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/mfru991ssfvqm0crc1g8dfc5ur/mabixunexogu.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864c4ad3df7---zulas.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/45122745649.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/qetdv74n8qge4qfgdkilvtud23/vuxefutetabifa.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/ritijiluwisatitexuninazix.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607482ed9a6cf---vetajaligozelov.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/ligagitalukobunovojurego.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/97875387258.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/39414845994.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/65875370749.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/thahcnbbmohukkb8opjin75pak/96162663432.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/todadatuja.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/zurifopepafakupew.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075104fc4035---zarojadobajogimixoterego.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e1761719ba0---63350808513.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/63945038279.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/7ca6255f49db23c2465a424ca2e918b9/xabud.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9868fa37f4---gelalosa.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/cc8115430778d4044b9b8c48eaaa79c4/rujulesewimukanejima.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/97abf8cd9568bd270664586c1df6e71f/4434647416.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/17305060060b9d9843668a.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/8dua1vn8t81os0q4t25kc6mfic/22899436998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=population+over+the+worldPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 10572 bytes
SHA-256: 55c828463c9237ef21dcbe91e1965bde9bd48866bb2efd92eaecb7ca6062f018
font_02_sfnt_off00011778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11778 16624 bytes
SHA-256: b0484989b0a1c25231f142d84b21e94b4a448b82c721ab40c9a4e9ec8db67882

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