Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44c4177933f6d8b…

MALICIOUS

PDF

68.7 KB Created: 2020-12-25 09:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a26f3b37cf8ce637b0ce77aaf4283a21 SHA-1: 729656ef18f50c397afb7b190bce8ec8e9aa42a8 SHA-256: d44c4177933f6d8b9dd48e4a9a6d44015d438150c4bd385266788e0323681c52
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The document's structure and embedded URLs suggest it is designed to lead users to malicious sites, likely for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffking.ru/aws?utm_term=alan+walker+ignite+official+video In PDF document text
    • https://cdn.sqhk.co/bojojiweg/jgggKge/93405410344.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/koloxep-baroteneloni-rekebitu-kimafaf.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/8970375.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/fokaginafomuv_bujuvasuka_wolej.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/mivuxu.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/wepuvorizivoniwip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5fdab4a8c7385.pdfIn PDF document text
    • https://pederojelukeb.weebly.com/uploads/1/3/4/8/134859697/7833210.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/tazor.pdfIn PDF document text
    • https://nebikaxo.weebly.com/uploads/1/3/4/6/134655772/1104230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5fa9664889016.pdfIn PDF document text
    • https://cdn.sqhk.co/panosiritu/J0QaLjc/cake_pop_recipes_uk.pdfIn PDF document text
    • https://sulewana.weebly.com/uploads/1/3/4/6/134605909/1424351.pdfIn PDF document text
    • https://lobizuwoxigamog.weebly.com/uploads/1/3/4/5/134515373/miwasolejuwarir.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/bb2b74f8-aa42-484c-9ef3-c9fe6176d600/57767396690.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_off0000cebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBC 5216 bytes
SHA-256: 017905ad4f1c98e180f006d772670fe9581b5a93fa41f1fad3b2a8b18b58cc5e
font_01_sfnt_off0000e0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B0 11636 bytes
SHA-256: 091a3289e6d5f3f620299f08e7454ddf395d3b7261c2d1e371575c3f8740f249

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