Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa661b7c091d832…

MALICIOUS

PDF

75.2 KB Created: 2021-03-20 11:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1ffe06ce7e3540cd613fdb5dd5dc9e26 SHA-1: 5b29610195e716d7ee06ca5eaca515e326baa33f SHA-256: eaa661b7c091d832292551b8641b9008d54a2e15e22af1048a37b299e343a543
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-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://fokemale.ru/123?utm_term=altered+state+of+consciousness+pdf PDF link annotation
    • http://remont-kholodilnikov.website/josuwitiwidepazawasudibomt9h.pdfIn PDF document text
    • http://love-your-lips.online/tamilrockers_new_tamil_movies_isaimini7g8rw.pdfIn PDF document text
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/naredet-dopimo-babifamexafubep.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/farepetedinag.pdfIn PDF document text
    • https://josuketazoropu.weebly.com/uploads/1/3/4/4/134481190/tanupijite.pdfIn PDF document text
    • https://kivisazof.weebly.com/uploads/1/3/2/6/132696558/nitezuduzad-wusuwe.pdfIn PDF document text
    • http://submonster.xyz/gta_iv_release_date_check_failure_como_resolverptjtn.pdfIn PDF document text
    • http://govakokes.22web.org/20376817792.pdfIn PDF document text
    • http://20970907.net/the_fault_in_our_stars_pages_and_chaptersa66c4.pdfIn PDF document text
    • https://wuzijitegufizu.weebly.com/uploads/1/3/5/3/135320378/kedutaxej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_5fdab8d4b74f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5fe7d6645b77c.pdfIn PDF document text
    • https://wipigoxexidon.weebly.com/uploads/1/3/2/6/132682030/ketagogomuwapa-firotekoxapilem-badowawonixaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470964/normal_6007a818f0b9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_603c32bdef640.pdfIn PDF document text
    • http://dagiravusuk.iblogger.org/bepantol_pomada_bula.pdfIn PDF document text
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/7ff4acc286765f.pdfIn PDF document text
    • https://jutegejedexugak.weebly.com/uploads/1/3/5/3/135384922/5614954.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nowavef.epizy.com/25969286063.pdfIn PDF document text
    • http://rawotagetanona.rf.gd/xedasadapis.pdfIn PDF document text
    • http://jirataser.rf.gd/becoming_a_supple_leopard_second_edition.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_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 5140 bytes
SHA-256: 2b1b790a022bb6b55fb2a2802b2afd4d09e35e79961368b93e21e08b0e3bcdbc
font_01_sfnt_off0000fc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 10232 bytes
SHA-256: e129a24a0c42e9f29d4b0fbf61ac7fc4f230f42ccb0712d1380e32cc4457131c