Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c2a3b9bd3628d7…

MALICIOUS

PDF

81.2 KB Created: 2021-02-25 08:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb67ade4a4198000f439035dea63e80c SHA-1: cf9eae221b9dbdfa6eb58b48354a4164f6f9f5fa SHA-256: 88c2a3b9bd3628d7a13a6e934507b2c90816e6fbe234e9d901d8f99b6adf839a
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 0.9996

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=em+manifesto+comunista+marx+e+engels+afirmam+que PDF link annotation
    • https://cdn.sqhk.co/mepetiruzi/fPjhid0/gay_sugar_daddy_dating_apps_uk_free.pdfIn PDF document text
    • http://walletelectrum.buzz/assertive_to_imperative_sentences_exercises5j46k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369161/normal_5fe4005f8dddb.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/L4ihbCN/monkey_go_happy_unblocked_hooda_math.pdfIn PDF document text
    • https://cdn.sqhk.co/pobefozo/wcjigfK/52812176054.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/icI1gd6/hocus_pocus_shirt_disney.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/lhehNKV/1137282564.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427828/normal_5ff3b61ba7335.pdfIn PDF document text
    • http://mp4.design/96582091475akft4.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/TDchiFm/gubewapasot.pdfIn PDF document text
    • http://zdorovienashevse.xyz/semuwotozuxesizekevax6no76.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/jajihho/wukowimogoxiz.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/hemghja/exo_members_ages_in_order.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454299/normal_5feba08f6e227.pdfIn PDF document text
    • http://detonic-deutschland.website/filofatusufitn91nu.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/giio1tO/azamara_pursuit_cabin_7116.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/ipI8hg6/felifotomilere.pdfIn PDF document text
    • http://fawejidiribap.22web.org/yearly_financial_planner_template_excel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vogojitipam.epizy.com/wugowumifukiwobopiduwex.pdfIn PDF document text
    • http://zexukojol.rf.gd/umbrella_academy_sheet_music_violin.pdfIn PDF document text
    • http://nowesiredud.epizy.com/ripamegepetedaw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 5352 bytes
SHA-256: 90ac5bd1bbcc8cfba31da82342b01404937a33689f179c049f6b5736a8d31bef
font_01_sfnt_off00010da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA2 13444 bytes
SHA-256: a99a1f9c34080bc3d23510cd35c99650c850f28965db1c3bf7269996ced30fa6

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