Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1dff218ab7d7e7d…

MALICIOUS

PDF

86.2 KB Created: 2021-07-09 04:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 67f2debdc1e3449e474d43186cce6f21 SHA-1: 27978f1e6f33fb1a860b6ab16dab3de9f70cc3f5 SHA-256: f1dff218ab7d7e7d19e5ac552a95fb42a8d8d7c51e5bde0f1559fcbfcaead388
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • 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.
  • 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://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/k87bl1lup4pgjieo8q4137khh5/523578221.pdf In PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/s1vud32gc13fogj0k1n23lhqs6/88284044482.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/jeboroganira.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/9344a1fa05850a4ff5dee24bb894c6b3/teduromaligajowiki.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/jelixofal.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ste74nhecong7nplil4rer5166/vulisexikak.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b521e572f---16537807145.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/14456660062.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3b7daecba---96949630804.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/31890521395.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a094bd5f41---92971772861.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ae1d91255---fazusaxejatevepamaji.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fb75b05e1---tunegulojujozab.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608223cab4984---63172877939.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/84880609653.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/87803702341.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/52u92ld7aiiivq30hgduc6qof4/40657072258.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/53286979104.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ea80a65f4f8ca11ad478c7a8721eae74/49812924400.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/ginerisikisonu.pdfIn PDF document text
    • http://vejwun.cz/images/rawojuwiw.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fba1141ff8---ruloj.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e97e11e89---80172081630.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/1e660b96dd19961d311ee5c2e1921c66/39965238675.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///67758319893.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9a98830fb---26287591542.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=creative+writing+topics+for+grade+2PDF 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_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 17048 bytes
SHA-256: d37b83037a82321146e05122cd9942122e149bdb06a5e469f134b53002a6834d
font_01_sfnt_off00011a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 11052 bytes
SHA-256: 376aaf6a9c3f2c223aeefe127536e0622adb8534b9f1dc586456450d0c1db4e4
font_02_sfnt_off00013435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13435 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1