Malicious PDF — malware analysis report

Static analysis result for SHA-256 8290837ae7e7dd54…

MALICIOUS

PDF

72.6 KB Created: 2021-04-05 13:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d212559f2746516d979148564f3a84d7 SHA-1: 7a4f6241beddbbbf156c6f1a04e726ade5218269 SHA-256: 8290837ae7e7dd541341dcbaf37ac38e171dca9ef551e9fb3dc2157402317f10
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains a reference to 'Columbus blue jackets game start time', suggesting a lure to direct the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=columbus+blue+jackets+game+start+time PDF link annotation
    • http://barcaporirternet-interbank-pe.com/2700918682sb6gd.pdfIn PDF document text
    • http://levantemosaic.com/stylish_text_online_for_pubgylvml.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_6024c118bd5b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414672/normal_5fce9e595ce3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_60125d8f0b806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481528/normal_6063bdfa357a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_603a666eec345.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/65525258548.pdfIn PDF document text
    • http://yewes.fun/giwunowalesalxafi1.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/the_raven_edgar_allan_poe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_5fd916a923d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_604e594431a3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383698/normal_5fc7683637ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_6022ca04ad5c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_60247cbb5dae3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wijegasijewen.rf.gd/72822420586.pdfIn PDF document text
    • http://junimuji.rf.gd/chennai_express_full_movie_mkvmoviesking.pdfIn PDF document text
    • http://lunufisisosixi.rf.gd/java_numberformat_parse_whole_string.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/civilization_6_persia_guide.pdfIn PDF document text
    • http://nobitinajed.epizy.com/alter_ego_plus_a2_livre.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/husky_450_chainsaw_parts.pdfIn PDF document text
    • http://dexifuv.epizy.com/7549009521.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_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 5304 bytes
SHA-256: 6dfa9fe20d258cd730d369a614e22faea26dff24bef333f292f2035a17d06a65
font_01_sfnt_off0000f29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29D 9972 bytes
SHA-256: b216ef8cb68a84c44b1f5d3c6816e96aa48cd010a6222a1985988f3e62ee3d44

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