Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10bdf9cc241c338…

MALICIOUS

PDF

84.9 KB Created: 2021-06-06 19:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8cd793234ca0ff99d4087ecf6930c015 SHA-1: caf55d7a7bbc960cf8247da027493f164cb011c9 SHA-256: b10bdf9cc241c3388b083cf64e79242a989bc77f297b23961394081efdb0a2f5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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 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://archism.ru/pbw?utm_term=differences+between+catastrophism+%2526+uniformitarianism PDF link annotation
    • https://dasifapuzo.weebly.com/uploads/1/3/1/4/131454731/selegotanigej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_60400d6ba1371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_6035f5ead2ba0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459060/normal_5fec06db3f66c.pdfIn PDF document text
    • https://topifovav.weebly.com/uploads/1/3/4/5/134595147/moniva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471234/normal_5fedf8e1bb96e.pdfIn PDF document text
    • https://fidexirubopuzer.weebly.com/uploads/1/3/2/8/132815065/fdf486ae8c64.pdfIn PDF document text
    • https://gubanezuwibudo.weebly.com/uploads/1/3/1/6/131606890/4858497.pdfIn PDF document text
    • https://mexepefavofuj.weebly.com/uploads/1/3/4/6/134659137/887e92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465935/normal_601ecf211b8c1.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4382770/normal_60b00847039af.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
    • http://ruwomodanom.pbworks.com/f/55316760592.pdfIn PDF document text
    • http://togusan.pbworks.com/w/file/fetch/144559119/how_to_stop_being_disrespectful_to_my_wife.pdfIn PDF document text
    • http://kemususi.pbworks.com/w/file/fetch/144725169/goliremiluxovure.pdfIn PDF document text
    • http://mijatonevu.pbworks.com/w/file/fetch/144597210/formulas_derivadas_algebraicas.pdfIn PDF document text
    • http://gitefov.pbworks.com/w/file/fetch/144570180/ketogenic_diet_recipes_free.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/how_to_write_bank_request_letter.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/f/58460431119.pdfIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144414639/skyrim_how_to_use_cbbe_bodyslide.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/botetosazolekokuge.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10098 5244 bytes
SHA-256: a3006951c2e30cdf7ed1bf6c02a48a862a84bd3047133d47535d870c5accb4e1
font_01_sfnt_off0001124c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124C 11296 bytes
SHA-256: b3e8f0b095126b442e02effcc6ecbfedafd83fe198fc34cdcc3e2ed1605e4195
font_02_sfnt_off0001383c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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