Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb96af0ed6a5a7c8…

MALICIOUS

PDF

81.1 KB Created: 2021-03-27 14:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 71e9baddcadca1b0dea5a1b550570704 SHA-1: 53e8c0a320e9dfcba169dfe298ac7bce483447c9 SHA-256: bb96af0ed6a5a7c825fc7df83f32ce8404870566f62168263edc87dc8dc8a026
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 0.9992

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://golowaki.ru/wix?keyword=sylvania+portable+dvd+player+manual+sdvd1037 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404512/normal_5fdfb8ef3389e.pdfIn PDF document text
    • http://submonster.xyz/common_core_sheets_dividing_fractions_word_problems2eisd.pdfIn PDF document text
    • http://jilet1.club/bavutodupomagikidujuve9dtd8.pdfIn PDF document text
    • http://lynciguest.com/21225672153qohhr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445735/normal_5ff6648fe2dbb.pdfIn PDF document text
    • http://odemebayisitrafik.com/39692624090dng2j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_605583080d4df.pdfIn PDF document text
    • http://micrometer25bill.site/883702289694t42s.pdfIn PDF document text
    • https://sudazevoj.weebly.com/uploads/1/3/1/4/131406082/2442172.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473638/normal_5ffe467565980.pdfIn PDF document text
    • https://foniliwis.weebly.com/uploads/1/3/2/6/132695455/velexot.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/5614461.pdfIn PDF document text
    • http://pornbustyvids.com/flip_or_flop_divorce_episodeqlvba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475739/normal_5fcd44ab226b0.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/bf70ae0d-1fc2-42ad-bef3-f3da8472f7c4/waxawewijakixinufuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e8431e-e096-48c1-9c55-8ea2bef7796d/lileluramalorupebubidunus.pdfIn PDF document text
    • http://nelipofamarul.epizy.com/transformer_centiare_en_mtre_carr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed535273-e088-4696-8e50-f5cc315c6046/used_boss_ve_20_vocal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58147770-882f-4fa8-b34a-cc1be740bcd3/typographic_logo_design_in_illustrator_-_beginners__beyond.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76cec73a-507f-4103-a703-a12c22e756c8/pogufufajamawivalexuj.pdfIn PDF document text
    • http://koriguno.rf.gd/merezomup.pdfIn PDF document text
    • http://kisopazagutux.rf.gd/35170726453.pdfIn PDF document text
    • http://bozexobasunuz.rf.gd/dorukokevolofegu.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_off0000fc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 5948 bytes
SHA-256: 50dad2f54a5a73225a5e0e7e06264f401d92aeab27b0db6b860ddd741a4cc7b5
font_01_sfnt_off00011049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11049 11268 bytes
SHA-256: a744ca7c7e0a24acbc5f280a2f4cf70b89fdff3b077c45fcdd44178373c3bfeb

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