Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc30438cb77c23c…

MALICIOUS

PDF

70.6 KB Created: 2020-12-26 16:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 30203dfcef88455eea0ee99e77bf16ef SHA-1: fcb70eae9410be237508e39d0e182ebd4e838541 SHA-256: 7dc30438cb77c23c4217d759a6b7629de1cbaa5df4fa3235003737a4e16cbae3
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. Another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO abuse. The ML classifier and ClamAV detection strongly support its malicious nature, indicating it's likely a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://gettraff.ru/aws?utm_term=class+attendance+chart+template In PDF document text
    • https://xitujufos.weebly.com/uploads/1/3/1/4/131483255/7513557.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/ziluvamavapabarujipu.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/jdiauq7/blue_heeler_australian_shepherd_mix_adoption.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/Nkwgjhc/jepojawitisumibiwoga.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.pdfIn PDF document text
    • https://rikujenaxa.weebly.com/uploads/1/3/4/6/134667742/cc030c0.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/2898556.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/sefukirexuwekij/zozumudobipawokufewozo.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/76809123318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c137abd-2a1e-4846-bd03-5172c074fcdd/barron_s_ap_biology_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/ginatibowute.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/58394089709.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/zarumuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb9f354-ea37-4719-be39-af8207bde6b3/83993223054.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_off0000da53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA53 5220 bytes
SHA-256: bd672242495acfd1491455e0336ff1974575d5162c7cbe636b722037e91d5221
font_01_sfnt_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 9908 bytes
SHA-256: 46d2ab7f223a2042e98118b08afe0adf86b22ffb31d40492a2331eeda5bf88ac

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