Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9bed0cb5f65458…

MALICIOUS

PDF

96.8 KB Created: 2021-07-26 08:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2ef6791832a71ed65527fd7e256f5e6c SHA-1: bef7022e13bfe0076bc9cba0084bf169d60a72d2 SHA-256: 7d9bed0cb5f654586bdcc2e8cdda067574beaab633401cf345e290c4a4788eca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's used to distribute or host malicious content. The document body is unreadable, but the presence of numerous external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5a7410181bceb9a922f8d3e4db2ca2d8/sataxopapumelik.pdf In PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/6c81785c914b317b41324753e98d542e/95278584766.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/l9bs20gm2snn0u2c7559kvs77m/33701390528.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/bisipitedewe.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-23/20210723173256637652.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/c4e55d87c76c26243fcb849ebf646fe0/dotujifujekagoxud.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/73203747320.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/31218215210.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/61ehbsnde207gou0ij75o21604/mitamosulexo.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/xidagare.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/lebezivokexutezumi.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/9be12915668f1c09f7350998e355e63a/vizolitemol.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f9bced1ae10---21051657068.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3baa6e426---zepemid.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/vezopuzamep.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/mmgb7p0fhp4284ttumjlfrb8lv/85742406288.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/4aclp2c9ep1ugbbohv2nhgngot/32179127684.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/70689980196.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/55a4ab44632263aaad9200d16f720e2f/88222112208.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/kovenuzapoxij.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/tegemezivanarozexexozumax.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/43849323062.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/1567259340.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/r3jvcsi76j1jjfb5c0c0dqc833/wululalufibexegurowofu.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749fdc1c1b8---11192415519.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160832812ec4f3---49546322875.pdfIn PDF document text
    • http://coriolis.io/outIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=elite+dangerous+diamondback+explorer+max+jump+range+buildPDF 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_off00011358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11358 17724 bytes
SHA-256: aedd3982279278e9e9c1458d58f2e27a14f99be00e14cd68bedce86671ad517f
font_01_sfnt_off000141a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A4 11404 bytes
SHA-256: 34295040c09e112d7a01c1e295ea6dda439cc0ddadce89cb842b6b1b0c0c2cf8
font_02_sfnt_off00015c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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