Malicious PDF — malware analysis report

Static analysis result for SHA-256 6602f82c042ec657…

MALICIOUS

PDF

66.7 KB Created: 2020-11-20 08:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3ad5709e6f3e7466cc1c2ffb006e3fb4 SHA-1: 76478bc357b53ffbd3fbc6e21c57dd6807ceb06d SHA-256: 6602f82c042ec6578424cb7467f3ddc8f13eeedd89b158c75ef9233d977943a2
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, consistent with tech support scams or financial fraud schemes. The presence of numerous external links, including a link farm, suggests an attempt to direct users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffset.ru/123?utm_term=malevolent+gladiator%2527s+chain+armor+vendor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5fb2e441c1382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453900/normal_5fb01bc977356.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/vujor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5fab5aa5536b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_5faaccaab6c6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5fa911f58b708.pdfIn PDF document text
    • https://folesatabija.weebly.com/uploads/1/3/4/4/134441350/pefado_gozaz_riweni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f90d85a36f60.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/e2b1cf49a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jipowumat/42021284565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c0c9a5-c5d0-4e14-a06e-46531aed9a9f/56246097715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8fa288-d978-4583-ae20-ec5f2ce72556/xupegedokilewegizegeru.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/19267455065.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_off0000c51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC51F 5452 bytes
SHA-256: 2c1de0bdfe9b14dab3f2f24e70fb33a8648d88c5ef50ee9aa598aeaf3f586bd9
font_01_sfnt_off0000d79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79E 11296 bytes
SHA-256: d446f679ff830e80db8d81c8d834780c477cd3edebf05ba0131c4681d1ee3938

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