Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9faa0615f6296bb…

MALICIOUS

PDF

73.2 KB Created: 2020-11-13 17:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ca7aa6b05adc8f9a0108d4d6516c1019 SHA-1: 147032f68844e1781ed05060ccab87a98801faf5 SHA-256: f9faa0615f6296bb6282eaf1ab2df1ff44bb0410bfe9c0a0e2d45767224977cf
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous external links, with one pointing to a suspicious URL, suggesting a phishing or redirection attempt. The presence of embedded links and the overall structure are indicative of a link farm or a lure for further malicious activity.

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
  • 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://trafficel.ru/123?utm_term=black+diamond+concepts+orlando+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403129/normal_5f98262688a3c.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/jefoximaviveleriv.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/2386540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_5f96f411e8444.pdfIn PDF document text
    • https://duxevuwelinabim.weebly.com/uploads/1/3/4/3/134353564/zugomuxubojoli-ripepovo-fenafabagojevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5f92898e3ef6c.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/fedufiporara/livuwejezidepegokuzebujet.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/cadaver_synod.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/80516168514.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/23293373349.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/46372043909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c75714c-a50c-44f8-bec4-c6de0838f511/on_parmak_klavye_dersleri.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_off0000e082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE082 5484 bytes
SHA-256: 7c206905fc22c15a24969a76519a8c65a7685a6f90d2e5bb8ae6a68eb1088bb0
font_01_sfnt_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 10828 bytes
SHA-256: c3a53c75b2cadfada06dede4f6c6de5caca68f444ab6e21c27aeac5f9596c567

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