Malicious PDF — malware analysis report

Static analysis result for SHA-256 87678781005f428f…

MALICIOUS

PDF

64.5 KB Created: 2020-11-27 10:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2be028c162bad72afbf7534804593ab3 SHA-1: 9d46c058688bfeb73043753547a8bd0f258c3679 SHA-256: 87678781005f428f155319adbcb8f393b335843ba363472cf7dd75f18ae1a3c4
216 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://biwireteput.weebly.com/uploads/1/3/4/1/134131636/dexiwi.pdf.
  • 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/aws?utm_term=background+news+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379379/normal_5fb55ed81e252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f8e2eb050ec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527164/normal_5fbbb12f4e0fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f93f78ca0003.pdfIn PDF document text
    • https://biwireteput.weebly.com/uploads/1/3/4/1/134131636/dexiwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f9c65ff917f6.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/batoragubukepo/44144831363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e0fa99-b881-4698-9685-b4416add4f21/waltco_liftgate_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/564e9d07-7ba1-4b52-ae52-36f84f482858/72694269281.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/gnu_gdb_debugger_command_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d02f99fd-d7b3-4b55-8502-590796b041ca/39662234504.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC093 5432 bytes
SHA-256: bba84cc26a6fcfd4e89fc5c0c21501b5835094698c1ec95fe932c7cabe36b4cb
font_01_sfnt_off0000d30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30F 10104 bytes
SHA-256: a3c146cbb01fcbcf294a5a4fefa4cb250ab26bffdc19f15f80f6d115d4c8dadf

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