Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86f9d4e10fbbc92…

MALICIOUS

PDF

74.7 KB Created: 2021-03-11 03:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6994c92690d73e4a36261ccefe64843a SHA-1: 38d8e0aaafa683b114b621c8cd390755a33ff811 SHA-256: f86f9d4e10fbbc9211a3b6ef5d1a38942fff30fb8a4370e24deb00897e29cd44
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing campaign, specifically impersonating Walmart to deceive users. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xagegebalelil.weebly.com/uploads/1/3/4/5/134579129/bubux.pdf.
  • 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://lozipotod.ru/wix?keyword=free+premium+accounts+minecraft PDF link annotation
    • http://classicalnaturally.com/quantum_chemistry_mcquarrieizkpp.pdfIn PDF document text
    • http://copyright-securityx.com/wepasenunutuzjr97.pdfIn PDF document text
    • http://tedoterolileme.iblogger.org/bewizokobeliwedepawumun.pdfIn PDF document text
    • https://xagegebalelil.weebly.com/uploads/1/3/4/5/134579129/bubux.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/8c92a6.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/wewebemumeg-kexaz.pdfIn PDF document text
    • https://somigoduwus.weebly.com/uploads/1/3/4/4/134470899/4211900.pdfIn PDF document text
    • http://tvoyoproc.fun/comunicacion_entre_personas_de_diferentes_culturasc6mvc.pdfIn PDF document text
    • http://sodaapp.club/solar_battery_tender_walmartpjg6r.pdfIn PDF document text
    • http://sun-italy.space/loviperaworasalavadoxesauhrrv.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/wutirom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfa7dd3-8a52-4d3c-a8de-a03c2055c981/47643533492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54944cda-8e5d-4ed7-a3ae-ff6467f84efa/toro_lawn_mower_parts_dealer_near_me.pdfIn PDF document text
    • http://dobemeze.rf.gd/oxford_dictionary_download_free.pdfIn PDF document text
    • http://wixobemiberug.epizy.com/how_to_boost_powerline_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd14836-ea31-4d17-8178-945e8c7059ba/97379186473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1de801-663c-4feb-983c-76c8033e15b8/fefon.pdfIn PDF document text
    • http://xadeboni.epizy.com/51460866763.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_96e1d4552c9f4fde9038e3fbfa7dc376.pdf?index=trueIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_843edb1c852e4bc68d55c0fa02ad179c.pdf?index=trueIn PDF document text
    • http://lemagokumir.epizy.com/60043322777.pdfIn PDF document text
    • http://lexojowal.epizy.com/betternet_free_for_laptop.pdfIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_5003c43b677e4beb8947cd3e239b24fe.pdf?index=trueIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_7e3d99ed9cda4f9c98b2b3834a1b64d4.pdf?index=trueIn PDF document text
    • http://funolowudako.epizy.com/96319251248.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_bf23f4094e0542ae8738603f6e1ac944.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_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 5084 bytes
SHA-256: b501fc42d11c3407c7974c39b8de3464ad1e79aecafe5a0a21da6b0460af7231
font_01_sfnt_off0000f90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90D 10640 bytes
SHA-256: db092c4d5941b1c0fa52a55b989ae2524a8a3f3f11ab4cfad118b30531c29d44