Malicious PDF — malware analysis report

Static analysis result for SHA-256 228d00ce2790f310…

MALICIOUS

PDF

77.9 KB Created: 2021-03-01 17:13:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 199eb279c3833baae3c7035713af50ff SHA-1: 21e6c09ebd8d041f3193a528214802458f4625e8 SHA-256: 228d00ce2790f310924fb3b1e0cc67f5a4231255ed128f93d7b7d880b67be191
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting services and are likely part of a link farm designed to manipulate search engine results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a tactic of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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/123?utm_term=effective+communication+skills+in+the+workforce PDF link annotation
    • https://cdn.sqhk.co/pazaxefuma/d8ggIhe/moneygram_app_send_money.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/bnhhNjg/34583762503.pdfIn PDF document text
    • http://letekidela.iblogger.org/serogarukowezawuxaliz.pdfIn PDF document text
    • https://digaporabanezaf.weebly.com/uploads/1/3/4/6/134689005/xubudilibudo_timaliwupule_napowejinag.pdfIn PDF document text
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/kusulonuxaz.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/vawibulufilukip-solube-pigopore-tubewupup.pdfIn PDF document text
    • https://mirexoxufi.weebly.com/uploads/1/3/0/9/130969656/powatajizutilimana.pdfIn PDF document text
    • https://cdn.sqhk.co/xegigujatefa/adha7Yh/rise_of_steel_game.pdfIn PDF document text
    • https://togawakavepanef.weebly.com/uploads/1/3/1/1/131163752/midobosine.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/ibwhage/14421646334.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/fDwicjg/5471871338.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/5cec07529355.pdfIn PDF document text
    • http://bafezixulu.22web.org/can_you_add_chia_seeds_to_any_smoothie.pdfIn PDF document text
    • https://bixuduserar.weebly.com/uploads/1/3/4/8/134861961/9056692.pdfIn PDF document text
    • https://xiduzejeg.weebly.com/uploads/1/3/1/6/131606953/lagulav-pukepibuwa-forixelabanitad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://katujomun.rf.gd/tartarin_de_tarascon_en_franais.pdfIn PDF document text
    • http://notaruk.rf.gd/bosch_tassimo_manual_de_utilizare.pdfIn PDF document text
    • http://wipapirub.epizy.com/cheer_uniforms_custom.pdfIn PDF document text
    • http://bawavejukedosuv.epizy.com/kaxoxiwelogixu.pdfIn PDF document text
    • http://bepukefaxefewe.rf.gd/bluestacks_android_emulator_windows_8._1.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_off0000f53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53E 5292 bytes
SHA-256: 26c679e5b578def539aa7dbabb5a17fcfd5c7303aa7692e68e484a893f2de86e
font_01_sfnt_off00010733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10733 10236 bytes
SHA-256: f270172ed42dd434b4c442e9685dc1f6103ee423afde2e53602c8c9fb0c78988

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