Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9296fcb42fe8658…

MALICIOUS

PDF

76.1 KB Created: 2021-02-27 20:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 223ee5ee99ac533d7a14fcb87acd4c9c SHA-1: 9f4cd2276ef4511ed69f01a95c871a7fd23bbbfc SHA-256: a9296fcb42fe8658189085296e57bf8a9a7ec5dc442bd602f3d50a4b55d9c095
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 malicious content. The document body, though heavily obfuscated, indicates a lure related to an 'investment agreement'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=simple+investment+agreement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452835/normal_602d923525d9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_603121c4d584a.pdfIn PDF document text
    • https://waxuxugiw.weebly.com/uploads/1/3/5/3/135312989/mugujalajaw-buserinijidax-xetim.pdfIn PDF document text
    • http://mainsale.pro/22661032770qthg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_60171ea5e29af.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/8d1933cd8.pdfIn PDF document text
    • http://epaytds.xyz/jaluxukeladuwutu3094.pdfIn PDF document text
    • http://rawenspant.online/fall_guys_running_animation1zb6c.pdfIn PDF document text
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/xuwafu_zuvimum_nozelosi.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/fecef74a1f06708.pdfIn PDF document text
    • http://websecurer.tech/turujuwex73d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_601ff2b097c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_6018782db8bf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444884/normal_5ff43a1ec12f1.pdfIn PDF document text
    • http://xomapometafa.iblogger.org/36540642679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479916/normal_6030d609bec43.pdfIn PDF document text
    • https://tetusujofejami.weebly.com/uploads/1/3/2/6/132695476/veroxiliw.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/9813439.pdfIn PDF document text
    • https://gepogixuzusesil.weebly.com/uploads/1/3/3/9/133999736/bajaka.pdfIn PDF document text
    • https://murafasonuralab.weebly.com/uploads/1/3/5/3/135398902/junew-miwedifilo-wigene-kikezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwuzowebod.epizy.com/potej.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_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 5304 bytes
SHA-256: 13cf3b278a43a4ab3a49ade0a0f699dacbaf1d0e5e02c0fb66fe6896f73cd315
font_01_sfnt_off0000fe64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 10608 bytes
SHA-256: d3b25b041c6946a5224105be13909bf1b7b0b6bad2d5ae8d7d3808ff36ed5435

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