Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfacc7355901eb1…

MALICIOUS

PDF

77.0 KB Created: 2021-03-19 05:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b5963fcdcffe7cb312506095ee4721cf SHA-1: 6571d98f64fdbde06bbb5049cb492281c5545645 SHA-256: 1bfacc7355901eb1459c0d0eaa41a3a5eaba3883347a96e619e0f73e2b78c2f6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=how+often+to+clean+masterbuilt+electric+smoker PDF link annotation
    • https://cdn.sqhk.co/xuluriwu/GhighWK/lewis_structures_of_atoms_worksheet_answers_key.pdfIn PDF document text
    • http://pakewiw.iblogger.org/edit_text_in_acrobat_9_pro.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/c1cbc.pdfIn PDF document text
    • http://regivag.iblogger.org/38379745519.pdfIn PDF document text
    • http://zuzitijimopa.22web.org/tony_little_gazelle_freestyle_reviews.pdfIn PDF document text
    • https://nikirepe.weebly.com/uploads/1/3/4/7/134743809/kizexudomezumire.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/gOhzZie/42961128217.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/LhjGhbI/cookie_clicker_ios_hack_no_jailbreak.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/fhashjj/modern_combat_5_esports_fps_windows_10_download.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/texudonemowa.pdfIn PDF document text
    • https://gesegalug.weebly.com/uploads/1/3/3/9/133999779/387ca00e777d9.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/kedibaj.pdfIn PDF document text
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/relefuxiziza_maxinizeb_dumer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezivepe.rf.gd/gta_vc_cheat_codes_android.pdfIn PDF document text
    • http://zilokujidetomo.epizy.com/66566971923.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/92039498075.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/child_adoption_papers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc29378f-29ce-41e1-ba3a-3e7ef866d73a/jimajasopifiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b67da43-c88c-4889-937b-f77813172f03/xapiviwe.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/gejozubusibulazepidejuxaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc990698-c000-44c8-9e16-1c10c12f491f/rurebolamorilemaruronu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1db4cd5-4e2c-4564-8e1e-79703aceb08e/ryobi_14_inch_40-volt_brushless_chainsaw_review.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_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 5284 bytes
SHA-256: 950f1da5ae545143d2e1c63d60ac2c424e81d3371f5f088d61f28023496a3065
font_01_sfnt_off00010342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 10300 bytes
SHA-256: 35600a815cc62276f7fa378521cb4f767bcaae5dfed4d065398de56d00ceaff0

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