Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e6a48b766a5118…

MALICIOUS

PDF

72.9 KB Created: 2021-06-09 23:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7faf0c179d52b4e4ec8a2c88c2cb8540 SHA-1: 13b1afd4c83994e8590db8752ff9e3de95b382e7 SHA-256: 32e6a48b766a5118eaaa4ce1844378f26f760ef18096b5898ca669581792ec89
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://coretry.ru/pbw?utm_term=golf+course+design+program PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454170/normal_603bbdffcc7e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_605578323a844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445101/normal_606d05215c539.pdfIn PDF document text
    • https://wovuwujofisup.weebly.com/uploads/1/3/1/8/131856276/3904831.pdfIn PDF document text
    • https://bokojisegozesu.weebly.com/uploads/1/3/4/4/134479890/bakawivom.pdfIn PDF document text
    • https://rejupalakutasu.weebly.com/uploads/1/3/7/5/137516983/dakolebebi.pdfIn PDF document text
    • https://noribiri.weebly.com/uploads/1/3/5/3/135347041/947065.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisaramunuf.pbworks.com/w/file/fetch/144774270/mojuziropovalop.pdfIn PDF document text
    • http://wufamazajo.pbworks.com/w/file/fetch/144594702/catch_me_if_you_can_musical_script.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/f/rilurikagom.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/f/bulletproof_monk_rating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e2ec422-17bf-44a1-9e10-c30183c4929a/what_is_islam_and_why_is_it_important.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144437835/monapetegelamuserutitova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e3a43b-bb0b-4eab-ad76-f8817434263a/dowawuwuge.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF78 5508 bytes
SHA-256: d619a2dbc7c578e29a67032ccdd8b27b3ff055b651c51a06b806e43f7d5a74db
font_01_sfnt_off0000f225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF225 10344 bytes
SHA-256: 0b882a78403678657c4d3d793ee3336a527f616259f7434c61a23ccce82ee53a

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