Malicious PDF — malware analysis report

Static analysis result for SHA-256 3533594f6eb26665…

MALICIOUS

PDF

66.9 KB Created: 2020-11-25 08:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7aad625489369595a091043eafea9fd3 SHA-1: 9e6a1113752a8f14d9b7555523701a767c71f4fa SHA-256: 3533594f6eb26665da22bc72a6f830102b07dd4c5be5ca6892424747c6018d0f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with one pointing to 'https://trafffi.ru/strik?utm_term=la+ley+de+herodes+significado'. This indicates a likely attempt to redirect users to malicious or spam content, potentially for phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://trafffi.ru/strik?utm_term=la+ley+de+herodes+significado PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f87d5c1dff43.pdfIn PDF document text
    • https://pimedoxeniku.weebly.com/uploads/1/3/4/6/134640330/7c287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373505/normal_5fbd401abc54b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5fbbc587c029c.pdfIn PDF document text
    • https://vijipivefewari.weebly.com/uploads/1/3/4/6/134624644/zedovosekiro.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/5740092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408593/normal_5fab56b950f1b.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/5a7b43f8-3286-4a00-9489-2b067992813c/kuxiluliwagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13925809-a5ab-481f-bb84-30fd81bd2d6a/jubexodelozusividogifes.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_off0000c86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86E 5328 bytes
SHA-256: a14a6208b531c9ce61e0ca5b5b8fa085a4f3062d0a79561b990c30304aca2bd2
font_01_sfnt_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 11212 bytes
SHA-256: 0653649a0ac719e3844fed9a28211a07e352031e7c58a5694d68d7404d44934b