Malicious PDF — malware analysis report

Static analysis result for SHA-256 197870e7523c2014…

MALICIOUS

PDF

70.1 KB Created: 2021-01-03 18:35:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5fde81f77dd980f6efc6329d0c9f9fb4 SHA-1: d15dc07ed069d5e297c833c124f5d93887079ae9 SHA-256: 197870e7523c2014e75cfd06346479a0c2800161bdead30912a2d57714f24449
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious or spam content, aligning with phishing and SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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/123?utm_term=wahiawa+middle+school+yearbook PDF link annotation
    • https://dojebuxepoviguf.weebly.com/uploads/1/3/1/4/131407435/497539.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5fe3e37456e68.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/dijhhmS/wifi_drivers_hp_laptop_windows_7.pdfIn PDF document text
    • https://zapilututok.weebly.com/uploads/1/3/4/3/134341349/xoriba.pdfIn PDF document text
    • https://cdn.sqhk.co/xekixuzurim/8V1shdN/fidovububaxetovazavenugu.pdfIn PDF document text
    • https://rixowumunek.weebly.com/uploads/1/3/5/3/135330445/bowaxi.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/0c05e30c-bd53-4feb-a071-7cdd5e769c77/24116986942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb49dbb9-ce1d-4d22-983a-a0f3b545cb16/61015329099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442bf427-688e-4eeb-afd6-484af57b0f32/secret_life_of_bees_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af006224-5fa8-4efc-b704-95bb02137355/vagevanisafegapinuse.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_off0000d493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD493 5592 bytes
SHA-256: 6c8deeec8d9b979cdd697a00b805b3d89a678be6a801dfb0a53b4171b8a9b87a
font_01_sfnt_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 10556 bytes
SHA-256: f290b116dd9430a7383f7c306aaf7e6a6ff8ae71400904a245c400505d3a67ad