Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea07feeea1207f4b…

MALICIOUS

PDF

84.3 KB Created: 2021-06-02 08:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b74ceaed055bb7e80af70ed7104e1086 SHA-1: 47d3faf8879a46f3377c6d8613c0b4578ab6c8b1 SHA-256: ea07feeea1207f4bfa3d5dfc0cd3cd873a7c19535a19b622b8cf72eaff50af2b
226 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. It uses a password-protected-archive lure. 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 0.9990

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/123?utm_term=angry+mood+off+whatsapp+status PDF link annotation
    • https://xufaxasevejanog.weebly.com/uploads/1/3/4/8/134886042/gabazomavevafodawim.pdfIn PDF document text
    • https://vuzitiruf.weebly.com/uploads/1/3/2/8/132814505/jipujifomirilam_dorujasirob_ketikowokebe.pdfIn PDF document text
    • https://vafumuwolefuz.weebly.com/uploads/1/3/5/3/135325426/tomazafimuxet-gudok-rudoxugatudi.pdfIn PDF document text
    • https://bofuvuwowu.weebly.com/uploads/1/3/1/8/131856225/70d084145f9fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479223/normal_606218ebcd7ff.pdfIn PDF document text
    • https://xotukowigadane.weebly.com/uploads/1/3/4/6/134683058/b1076e.pdfIn PDF document text
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/xidanumawivej.pdfIn PDF document text
    • https://jotuxopa.weebly.com/uploads/1/3/4/2/134265841/44db2.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4481999/normal_60b2ecfd89818.pdfIn PDF document text
    • https://lukejofavum.weebly.com/uploads/1/3/4/4/134455809/4ff29fe6fec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_6028e40d53742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_6041c42862677.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5df95e8a-5889-4b89-b133-78a27ea99e30/berserk_chapter_359_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c821bc6c-a93a-4d38-a0bf-410a377b4291/how_do_credits_work_in_university_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680ec24c-d489-45e0-8dbd-69c3bd628fc0/sujav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10049e6-e3c6-49f4-b4f2-e5e0ff86861b/rerobowokalajaraxof.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/w/file/fetch/144423477/varuzutonasediwunufakaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c1163bd-34bf-4f5c-877b-f95f5b40c7f0/how_much_is_a_65_inch_sharp_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/551a14d8-3bb7-4994-bcb0-f581c6dcfc22/15145960247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55fce98c-ecd1-478c-a874-a3572be8820b/dell_latitude_e7450_screen_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d32b5922-b5bc-45b5-9837-f6485c03ce42/woman_hollering_creek_quotes_analysis.pdfIn PDF document text
    • http://zufogopojut.pbworks.com/f/toyota_techstream_14_crack.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD66 5324 bytes
SHA-256: ac7f50c9e8eae3459551d6687fb877703a1bb75e7b322d63c1ae033d3310949a
font_01_sfnt_off0000ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4C 2140 bytes
SHA-256: a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b
font_02_sfnt_off0000f924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF924 11092 bytes
SHA-256: 183eec5bcffcfb66a99d4f5697ec77beb8b5c1993877247d2c525b5ef0aa395b
font_03_sfnt_off00011e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E53 16704 bytes
SHA-256: e8ae33b749408c9b70fdc16f70abeb7cb81171e5e6f4efe0b4ebe9b31baeaba6
font_04_sfnt_off000134da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3