Malicious PDF — malware analysis report

Static analysis result for SHA-256 3041e861fca107ca…

MALICIOUS

PDF

72.3 KB Created: 2021-03-01 06:03:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: eaf5828e100750df9624b1d373cf6d91 SHA-1: 7458415685bd3b43b12465a19dcc0ab85748d9c4 SHA-256: 3041e861fca107ca31dac8484aa49e70b9bf7d0aad67ab83e3939a4025fa3f84
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to disposable domains, and one heuristic identifies it as a link farm. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=what+is+business+analytics+examples PDF link annotation
    • http://dkmz2.club/pals_patient_transport6kypp.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/757147.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/which_fruits_are_gluten_free.pdfIn PDF document text
    • http://hugertely.xyz/adobe_sketch_draw_apk0t0g6.pdfIn PDF document text
    • http://antileqphh.site/vissani_refrigerator_not_coolingw43kt.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/28171203738.pdfIn PDF document text
    • https://fejuzewe.weebly.com/uploads/1/3/4/8/134883228/refowevujagaj-wasivedubu-libigedepof-mutorojakip.pdfIn PDF document text
    • https://bomazadoxu.weebly.com/uploads/1/3/4/4/134474586/7529036.pdfIn PDF document text
    • http://tradestaroffice.com/stack_on_22_gun_security_cabinet_for_sale7yr0f.pdfIn PDF document text
    • http://perevod24-card2card.site/86689018750akktv.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
    • https://s3.amazonaws.com/resabomibogodaw/que_significa_el_porcentaje_de_grasa_corporal.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/bitumareke.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/94211915423.pdfIn PDF document text
    • http://lofadekiwi.rf.gd/najazoxaxojadax.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/alarm_won_t_sound_android.pdfIn PDF document text
    • http://vaxalisuj.rf.gd/spanish_to_english_verbs_worksheets.pdfIn PDF document text
    • http://nadilafirot.rf.gd/69653379072.pdfIn PDF document text
    • http://ketened.rf.gd/what_is_port_443_normally_used_for.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD138 5172 bytes
SHA-256: f4ce315cf6cf9d9321c692227f7c5f95aaa4fa85d898cc3ab40ee31b82cf8a06
font_01_sfnt_off0000e2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 10136 bytes
SHA-256: ca75e1d2674f80a30e89d927ec7b3a0af373c70c5c79f02fd694735299fb56f1
font_02_sfnt_off00010542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10542 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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