Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e6f1fe90095419…

MALICIOUS

PDF

96.7 KB Created: 2021-04-04 04:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b6949f6bae0e8e2ab36dce97fb1342eb SHA-1: cd7ac6eaed065ffc89becfad65b653a81e494964 SHA-256: 71e6f1fe90095419ab367fd57c4c52b750306fd0b27bba1bc40f5281ef00f498
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/123?utm_term=whatsapp+status+love+image+video PDF link annotation
    • http://lazakefezives.mygamesonline.org/alemtuzumab_package_insert.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492901/normal_5fe6782cd0b3f.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_6036bc5d8da3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_6053772f656b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499021/normal_6068d9382defb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_6037d953abb8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_5fe7a796d6bfa.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/33380682250.pdfIn PDF document text
    • http://dalkomis.website/how_to_reset_sony_bravia_tv_password0ozkh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463532/normal_5fe9ceb0c433e.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/heat_transfer_conduction_convection_radiation.pdfIn PDF document text
    • http://xafomona.mypressonline.com/the_lost_city_of_atlantis_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/84229088426.pdfIn PDF document text
    • http://wuragumok.atwebpages.com/neurogenic_bladder_dysfunction.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/the_white_princess_episode_3_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33145698-5bf8-485d-9dc0-b9c2968139c1/thule_bike_rack_roof_racks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9844725b-c745-43d0-8747-77d5899a090b/in_the_cemetery_where_al_jolson_is_buried_by_amy_hempel_summary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D69 5348 bytes
SHA-256: aab46d139abd72306a8f7222470adf71418206289078fe197941be6368f3ade1
font_01_sfnt_off00013f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F82 2188 bytes
SHA-256: 8243a2978354b99ad9fc1765d3878328d49e2998d0a5549394a0bdfef85e0506
font_02_sfnt_off000149a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A1 12408 bytes
SHA-256: e308df06aee102a20753a9ae39b1e0e7b073851d9ce40d631a171d4fe9567184

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