Malicious PDF — malware analysis report

Static analysis result for SHA-256 080d48b2766cac55…

MALICIOUS

PDF

81.8 KB Created: 2021-01-08 08:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8f27ec3effd2db9342b8a97a2e584feb SHA-1: c32218cdcd95c62eb3e5664ecf4d123669d8c3ef SHA-256: 080d48b2766cac5588de7b43c09f9c6f792c9af96de7f3b6b8f71a4caf26c6ab
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document contains numerous embedded URLs, many pointing to disposable hosting services and using UTM parameters, characteristic of link farms designed to redirect users to malicious sites. The presence of these numerous external links suggests an attempt to distribute phishing content or download further malware, aligning with the 'link farm' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=tru+testo+fuel PDF link annotation
    • https://jakipafowikodo.weebly.com/uploads/1/3/1/0/131070805/dizabelegip_mewelaxeji_vasoxojuwet.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/hg8ggN2/cancion_italiana_youtube.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/pafekuxirikuk.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/kubirufemu-pixurofatujupe.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/gjeidif/20844039235.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/mejutolorijan.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/NRhehdL/66291198000.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/jdKHKib/capcom_home_arcade_games_list.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/jgd9hay/3353292850.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/4117077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fb3d6382c376.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/bhhi3gO/blaze_and_the_monster_machines_clothing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416316/normal_5fbf11efce7e3.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/fgdvieH/81826756371.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/11995b03-b1b3-4455-965c-5d5e3c08022a/text_your_ex_back.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_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 4500 bytes
SHA-256: 018a90a238227f1a9b061fb6ef9d43222a9b35f4cc22fdf1d1f307b2ff431e55
font_01_sfnt_off000113f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F8 11380 bytes
SHA-256: edeb523972f7aee6d8bf408e1b8af1af3ab7c4f8f5709036c27b0e9d92ef5587

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