Malicious PDF — malware analysis report

Static analysis result for SHA-256 360fdece09e189d3…

MALICIOUS

PDF

76.2 KB Created: 2021-02-16 11:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f8b546add01571d5947d144c94a38c9a SHA-1: 82480a76dd937f33c912df5a1fad0f3700acb7e7 SHA-256: 360fdece09e189d30cce05ddcf37ce084bdc2c01c226b5659c84c44f3003295a
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 0.9998

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 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://baarspo.ru/wix?keyword=blackhawk+middle+school+address PDF link annotation
    • https://sosufafa.weebly.com/uploads/1/3/4/8/134862430/temuk.pdfIn PDF document text
    • http://loveantravel.xyz/4_pics_one_movie_answerscjhy9.pdfIn PDF document text
    • http://lishop.site/opat_beep_test_scorecard9x42m.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/bEDMg3Y/14698581784.pdfIn PDF document text
    • https://cdn.sqhk.co/xobupuwulawe/jdgcXqV/coins_ph_wallet_free_download_for_pc.pdfIn PDF document text
    • https://lewibodozibepa.weebly.com/uploads/1/3/3/9/133997785/gejekavabed.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/QgdslE1/88644504440.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/hjhfgjb/zed_build_lol_wild_rift.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/70teHjd/calendar_2020_december_word.pdfIn PDF document text
    • https://gatiwisukebemo.weebly.com/uploads/1/3/1/4/131438587/b0d885f3a.pdfIn PDF document text
    • https://lolifibek.weebly.com/uploads/1/3/4/6/134634661/eb3b4f627.pdfIn PDF document text
    • http://ourfutures.space/betuwvbtue.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/fgiSDhi/f1_manager_2020_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/hgijdhh/kingdom_connection_email.pdfIn PDF document text
    • https://cdn.sqhk.co/xaveredero/jCgjfhb/bidiforupazare.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/tamiverokikipida.pdfIn PDF document text
    • https://cdn.sqhk.co/disemelukap/VWuhbWi/dead_trigger_2_offline_zombie_shooter_mod_apk.pdfIn PDF document text
    • http://djami.ru/14419416990dbuey.pdfIn PDF document text
    • https://cdn.sqhk.co/dilujuzaga/6jgijUr/pavarumoguzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 5384 bytes
SHA-256: c2fe6c664829e5315ec98c457e6ce28b43ba3c3b97c25f79ae6a813e56b7ab23
font_01_sfnt_off0000ff96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF96 10440 bytes
SHA-256: 2a2d0259d342cda2b18ef0b217427d314c25bbcc73197ab26e0bd456e2ca122c

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