Malicious PDF — malware analysis report

Static analysis result for SHA-256 224f1fe365133909…

MALICIOUS

PDF

77.5 KB Created: 2021-05-11 18:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9925abfeb8bebcde65ebab4f03ae7468 SHA-1: dd0a734973f193e69608ffef7b32c30669c9671a SHA-256: 224f1fe365133909e7497a78980175ff9fe391f07dbed72fb115b0ecfe88e398
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary URL pointing to a suspicious domain associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content, likely for credential harvesting 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://soxebez.ru/strik?utm_term=how+to+reset+a+hardwired+smoke+detector PDF link annotation
    • http://russianstravel.ru/18643156360y040m.pdfIn PDF document text
    • http://philonio.online/crossword_answers_today_wsj9w9lb.pdfIn PDF document text
    • http://barbanapoli.moscow/battery_tender_jr_red_light_stays_onmo9pq.pdfIn PDF document text
    • http://golden-charm.ru/how_to_talk_about_love_with_a_girlpga71.pdfIn PDF document text
    • http://topsale.pro/xomubupudideji5gxjk.pdfIn PDF document text
    • https://mesukaxepa.weebly.com/uploads/1/3/4/7/134728578/mamewe.pdfIn PDF document text
    • https://tewuwixo.weebly.com/uploads/1/3/4/6/134629191/6388466.pdfIn PDF document text
    • http://winoorama.website/parallelogram_worksheet_geometry80lym.pdfIn PDF document text
    • https://jotabejomunumog.weebly.com/uploads/1/3/0/8/130813846/4512909.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/libro_el_cerebro.pdfIn PDF document text
    • http://doordash.link/how_to_train_your_dragon_toothless_cutedjbxd.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/98718412351.pdfIn PDF document text
    • http://adminhalil.com/ninarewi2s832.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/e174322e-119b-4f7a-a321-bd097bebdb85/peavey_vypyr_vip_3_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78c21ee-43b1-4b86-b479-ee27d0f21dfb/a_sand_county_almanac_aldo_leopold.pdfIn PDF document text
    • http://fupewazogapoda.rf.gd/tifarivozuzamejosi.pdfIn PDF document text
    • http://fafivanewus.rf.gd/automate_the_boring_things_with_python.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_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 5264 bytes
SHA-256: c11e3c14420ed2bd1fba628eb93eb81f10e654d8b396a4bea9b60ae822ed35f1
font_01_sfnt_off000102b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B4 10596 bytes
SHA-256: 9fd7613d174752d82927a9c4fdf6e4710a9f0b205f880840552d6413a05bbe71

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