Malicious PDF — malware analysis report

Static analysis result for SHA-256 789ff0629f7d454b…

MALICIOUS

PDF

76.3 KB Created: 2021-06-12 18:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1ab50d473089691fed7d6739f31be68b SHA-1: 8f34030ce32527ae95498fe7cb19c05ec0c3ac35 SHA-256: 789ff0629f7d454b883d77f21469b96f8eebf7dc9b0d2bb76b0d2e33cafd3b0f
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 0.9956

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://crysiq.ru/pbw?utm_term=adventure+time+huntress PDF link annotation
    • https://neverudinirol.weebly.com/uploads/1/3/4/5/134585264/e0ce2762.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/faliwi.pdfIn PDF document text
    • https://lutapusudifo.weebly.com/uploads/1/3/1/0/131070527/lisujarikaf.pdfIn PDF document text
    • https://jugunita.weebly.com/uploads/1/3/4/4/134440710/516723.pdfIn PDF document text
    • https://bidoruwo.weebly.com/uploads/1/3/4/6/134651737/f023b211.pdfIn PDF document text
    • https://radugolun.weebly.com/uploads/1/3/4/3/134367443/7cd4d1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425760/normal_5ffa15e4b99c8.pdfIn PDF document text
    • https://sofusosixep.weebly.com/uploads/1/3/4/4/134493363/lesidaxi-pufuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_6030a7c332552.pdfIn PDF document text
    • https://voradirara.weebly.com/uploads/1/3/4/7/134744625/2548185.pdfIn PDF document text
    • https://xefakebeka.weebly.com/uploads/1/3/5/9/135993821/441188c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425484/normal_5fd2ccb05a95c.pdfIn PDF document text
    • https://sogekapi.weebly.com/uploads/1/3/4/8/134891770/3dc7dee.pdfIn PDF document text
    • https://simujoxeripo.weebly.com/uploads/1/3/4/8/134846432/f176b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5fc56fd968e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407780/normal_6031ba8a800c4.pdfIn PDF document text
    • https://gazodajatara.weebly.com/uploads/1/3/2/7/132712558/lijelunej-marosuz-votojel-julazudufeju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tarogifere.pbworks.com/f/hoover_turbo_spinscrub_50_manual.pdfIn PDF document text
    • http://vibevekofano.pbworks.com/w/file/fetch/145078647/omegle_free_random_video_chat.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144411849/20_laboratory_apparatus_and_their_uses.pdfIn PDF document text
    • http://bidudilobofu.pbworks.com/w/file/fetch/144704133/zemavegunigimulaz.pdfIn PDF document text
    • http://wepadigisita.pbworks.com/f/download_game_of_thrones_season_8.pdfIn PDF document text
    • http://saxonax.pbworks.com/w/file/fetch/144696804/al_bidaya_wan_nihaya_in_urdu.pdfIn PDF document text
    • http://mofarires.pbworks.com/w/file/fetch/145170789/bancos_en_new_york.pdfIn PDF document text
    • http://giribuv.pbworks.com/w/file/fetch/144543357/can_exposure_to_mold_cause_tonsillitis.pdfIn PDF document text
    • http://ravaxes.pbworks.com/f/zinubafoveluxuremol.pdfIn PDF document text
    • http://guxofesam.pbworks.com/f/the_miniature_guide_to_critical_thinking_concepts_and_tools_publisher.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_off0000eefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFE 4872 bytes
SHA-256: 80990f7fcdf7713d6e4bc246276985aaf5e359d1c0fa63347ad842d6f5898bc5
font_01_sfnt_off0000ff67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF67 10616 bytes
SHA-256: 3976cd7fbcee1321601105a597a59563950eb77bdd463405d40ce5cf6b9ff01c