Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f70adda449ae836…

MALICIOUS

PDF

81.0 KB Created: 2021-05-09 23:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d76fa55f355bec35049981482e275f12 SHA-1: 3e29dad8906308e5faa678e9d2f9a7538273cb05 SHA-256: 0f70adda449ae836b3f8334d46e0fbb07dc3798e3a0ccb233bcf722c96d80103
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains text related to search queries, further supporting a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://kuzutuzo.ru/strik?utm_term=what%2527s+the+best+self+tanner+for+face PDF link annotation
    • http://favanitum.iblogger.org/which_harmonica_should_i_buy_for_beginners.pdfIn PDF document text
    • http://fofitev.22web.org/ekonomi_politik_marxis.pdfIn PDF document text
    • https://nebilewanowuz.weebly.com/uploads/1/3/6/0/136083660/nagesoxeleves.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/botulinum_toxin_aesthetic_medicine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414514/normal_5ffcdbcb97249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5ff6685ff20e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_6028e4570e859.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388158/normal_5fc593be8b75e.pdfIn PDF document text
    • https://nuzewotamomumaf.weebly.com/uploads/1/3/4/7/134701518/4793078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376857/normal_606cd993366a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369514/normal_60011dab26fc9.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/xutelisew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451220/normal_605506b345414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417998/normal_60188f4a376e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5fdbd4e15b818.pdfIn PDF document text
    • https://musibagufes.weebly.com/uploads/1/3/4/5/134587398/fupamobegigeverofap.pdfIn PDF document text
    • http://bulubuzigajuzar.getenjoyment.net/how_do_i_become_a_certified_forklift_driver.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/270c2b85-d396-4505-be87-70f54ab6f15d/primo_bottom_load_water_dispenser_cold_water_not_working.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/pelutuwos.pdfIn PDF document text
    • http://zuputes.atwebpages.com/19538557679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab53c63e-67b1-4a04-92f8-6e671121b245/cost_to_repair_jeep_frame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf79699-f3e8-4501-8d7a-d9c916a3e7e6/rikalovasajuk.pdfIn PDF document text
    • http://vovexibixi.rf.gd/kogeboj.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/fekimitiwaxukijedolorubol.pdfIn PDF document text
    • http://lotapit.epizy.com/42142521072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a22e7a2-acb8-4ab2-8b85-15c71a2ad2d4/dubekavekebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a4daaea-93af-49b6-b2e1-2cb10d56201a/xigekezadufabivamaladal.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_off0000fe5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5B 5156 bytes
SHA-256: ec21d4c626d24196a2a79b669fb2e2b4e28d6406ce380f6d4dd36d6b5b11bd7c
font_01_sfnt_off00010ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF5 11280 bytes
SHA-256: afdffc6845dca82f68280a22410ac134ed2eec4264099b54f433a72793e13390