Malicious PDF — malware analysis report

Static analysis result for SHA-256 97081ee55e1af269…

MALICIOUS

PDF

75.3 KB Created: 2020-11-19 00:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 604e7c67853e1beeb08c14bcd56e02e1 SHA-1: 36824a62a4491565fc199ea91450d8f10217fa7f SHA-256: 97081ee55e1af2693e9d0aebde6f4ac39d2a168eab926e383934c89474bd78b7
164 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a link farm with numerous external PDF links, suggesting a phishing or scam attempt. The presence of a 'download button' heuristic further supports this. ClamAV also detected the file as Pdf.Phishing.Trojan. The embedded URLs likely serve as lures to download further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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?utm_term=the+little+mermaid+vanessa PDF link annotation
    • https://nutolaje.weebly.com/uploads/1/3/4/5/134596366/ca34aaae961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421036/normal_5f9840e441b81.pdfIn PDF document text
    • https://ruzudafuzozuxu.weebly.com/uploads/1/3/4/8/134847081/kunagegivedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_5faa0de688ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_5f8d7d95a3c9b.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/gidibesuxi/kuwinuzebafuvagugu.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/datasheet_view_this_control_is_currently_disabled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac9a5eb-d7c8-4a9b-bc7a-dfcf40b8a9d5/71063949612.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/96465875803.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/gabion_wall_construction_details.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/52598862158.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/types_of_albinism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc44b9f-745d-4a7b-b339-72c6945e1cdf/tajefuwu.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 4

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_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 5076 bytes
SHA-256: f3650fd94c4f575be91b1df38c561da5fec7de0ea2ed36eaa94bded5671cce60
font_01_sfnt_off0000fb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB66 11040 bytes
SHA-256: 427e14f85cd9c87f6efe146dc1aa9c52c0526506e28ecbb4dfc8f33bd01901f1

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