Malicious PDF — malware analysis report

Static analysis result for SHA-256 19643a2bbb066c70…

MALICIOUS

PDF

75.0 KB Created: 2020-11-10 19:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7dcd0de59e220f8db03f4cefd4030f4c SHA-1: 2b7853968308e84f9e0f30fb9f8adc5a4cdbd2a1 SHA-256: 19643a2bbb066c7053b0809a38bc2750705d57e2241fa0efe8a56d6f2e1b8dfc
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1539 Steal or Forge Credentials

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing lure. The document body, though truncated, suggests a 'power of attorney form' pretext to entice users to click embedded links. The presence of a large number of external links, many hosted on disposable domains, points towards a link farm used to distribute malicious content or harvest credentials, consistent with MFA/one-time-code harvesting lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://traffnew.ru/strik?keyword=power+of+attorney+form+for+ohio+bmv PDF link annotation
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/11c28ba93f.pdfIn PDF document text
    • https://jakinamil.weebly.com/uploads/1/3/4/3/134391996/2463763d8f.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/nivon-dokivanil.pdfIn PDF document text
    • https://kolerekum.weebly.com/uploads/1/3/4/3/134350376/judigopogonug.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/raxefiko-winukiwoxuvi-bigaga-jepininuvasono.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/xuxurufusasufusiw.pdfIn PDF document text
    • https://sixexarujizevav.weebly.com/uploads/1/3/4/5/134584368/7035a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f9aa9e296696.pdfIn PDF document text
    • https://rutizinudepedo.weebly.com/uploads/1/3/4/4/134483735/4487833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f9260b0acfc6.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/45233e91-2cf3-4fe2-b729-840a00becf79/zafabuwed.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_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 5192 bytes
SHA-256: ee64a53ec27f4c08a15aba1fc05407edf9d6908cda3f3bb9e5db2a3e26fc1ddd
font_01_sfnt_off0000f7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DC 11576 bytes
SHA-256: 8e6721020e6dd5056997eb4b14f08d692e32d37104f8296af5988af5eabdd23b

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