Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e471e6b810d684…

MALICIOUS

PDF

75.1 KB Created: 2021-03-25 12:09:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7f8cfa1b92151924690bbac11001ba20 SHA-1: 131a53efa4cf538e90cfed23b640723777c6a2d1 SHA-256: 80e471e6b810d6849c79edd61809177f9fb3f6f5a1c0018bb672ea87cef55078
186 Risk Score

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=multiple+transformations+answer+key PDF link annotation
    • https://cdn.sqhk.co/wakivugex/bieIieI/58683053762.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/djgidjc/simon_s_cat_pop_time_endless_challenge.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/VgdoCgi/kowopiwonafipo.pdfIn PDF document text
    • https://leniwexobopusez.weebly.com/uploads/1/3/4/7/134713406/7465764.pdfIn PDF document text
    • https://cdn.sqhk.co/tifesijoja/hijgihd/dofosujiloxula.pdfIn PDF document text
    • https://vitekola.weebly.com/uploads/1/3/4/4/134461908/9152d4a154c.pdfIn PDF document text
    • https://ledegukumimajem.weebly.com/uploads/1/3/5/3/135393042/8738720.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/jfThfje/frog_good_luck_charm.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/jj4ajdJ/1751322558.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/aGWdbif/jeninusuwovetusujexax.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/ejg0ijv/hearts_card_game_free_download_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/Shgp262/dukopita.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/mimonalenab-xugidoval-gidesupepuzu-mafivakuvewurok.pdfIn PDF document text
    • https://cdn.sqhk.co/lemipetukaso/gbljghg/ponujubanejux.pdfIn PDF document text
    • https://cdn.sqhk.co/wadebekop/iiiG5gi/bamadufom.pdfIn PDF document text
    • https://gegivibubijob.weebly.com/uploads/1/3/4/5/134507206/3c76d9.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/hcw7Icj/taxuzekowinipasi.pdfIn PDF document text
    • https://cdn.sqhk.co/tabawapizak/ejjj4Sm/dual_citizenship_meaning_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4f0f5a39-0a2f-4cdf-b4e4-40a644fad8b9.filesusr.com/ugd/2024fe_fce2380ac87d426f92afbedc092a3b3a.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_ca5310dc9fae4d1cb1fd603dbb9f3549.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_a93ba540f2ce483e9fd8f9de400bd7cc.pdf?index=trueIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_a5d18b1022904939bb699b9064c76bca.pdf?index=trueIn 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_off0000e927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 5312 bytes
SHA-256: 5a14eaab883e4892eb04d8e1e6f2da4cbaed48f11018879a466681f12245bdc4
font_01_sfnt_off0000fb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB45 10568 bytes
SHA-256: 1b075b79c51c746b6ee7c6d2079780bf0e0fbb53d11b84a4d65df0a8e98f266a

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