Malicious PDF — malware analysis report

Static analysis result for SHA-256 9162accc881499f7…

MALICIOUS

PDF

88.4 KB Created: 2021-03-03 09:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f6f391904d5b8c27e5462eab707d841 SHA-1: d392bccccaf1a033319785e3ea90d06c4ee9285c SHA-256: 9162accc881499f73df154529e2506899c2647256ee316347e9f8ac39b59b4ee
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically mimicking a search result for 'Adele someone like you easy piano pdf' to entice clicks. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=adele+someone+like+you+easy+piano+pdf
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/toxenedoxadoma_zofaxexa.pdf
    • http://zonizubiro.getenjoyment.net/cuntos_milmetros_cuadrados_caben_en_un_centmetro_cuadrado.pdf
    • https://vedewoxid.weebly.com/uploads/1/3/0/7/130738666/juzokipiguvib-nojojivuzam.pdf
    • https://fugakesuj.weebly.com/uploads/1/3/0/7/130776648/dab40e6c17.pdf
    • https://vepezoroz.weebly.com/uploads/1/3/4/6/134605761/5e2cd.pdf
    • https://foxenaduro.weebly.com/uploads/1/3/1/1/131164157/51b941b457b5b.pdf
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/9632939.pdf
    • https://cdn.sqhk.co/duditizonut/ggjcgij/fitness_training_for_mountain_hiking.pdf
    • https://cdn.sqhk.co/luwiwaduna/J81gdhd/horizon_classes_bhopal.pdf
    • https://vozomazusow.weebly.com/uploads/1/3/4/5/134510153/milokeni.pdf
    • http://xepuvibigin.22web.org/carrom_pool_game_for_android.pdf
    • https://movamapipimopi.weebly.com/uploads/1/3/5/3/135303402/tofiviwuganitox-sulixawokidamu-timawi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gezewezelatemak.epizy.com/google_maps_api_python_distance.pdf
    • http://vutupaxuvidebif.rf.gd/crack_para_abbyy_transformer_3._0.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eba.bin
d35a029f62351083290ace07545686d290f227e08142d7faabce230b84339dd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 5048 bytes
font_01_sfnt_off00011fd7.bin
50e0e2a8c1e7449c8fed9cc47156a1108e780d82c653b5f3bcebbcf66dc67cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD7 11476 bytes
font_02_sfnt_off00014659.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14659 4324 bytes

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