Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c42f6ed2141f76e…

MALICIOUS

PDF

69.8 KB Created: 2020-11-21 01:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0152498424dbe6e601416362a22f08e5 SHA-1: 2a94451e9746891540134956335ab968c7d597fd SHA-256: 2c42f6ed2141f76e032a3edd54ab97b09341e54291a3da3b975ff63d26c57640
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure indicate it is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=zulrah+pure+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f9c5942f1934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f887eaec137b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5f9724af46349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f967e2cef16c.pdfIn PDF document text
    • https://xilizotuxepaxi.weebly.com/uploads/1/3/4/3/134309236/4e6530260afa82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f90070269a1c.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/xefejevife/61786331853.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/47859412332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3514354-83e0-4644-8496-37a85a96934c/gujazeru.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/33324190765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63158c6-750e-4414-a99b-3a9426e0a78e/nombre_para_programa_de_radio.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/dowavafetig.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_off0000d5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DD 5000 bytes
SHA-256: d8700fe337da84a3ef62b98f38d06aadd792426f902aa4bf096ff026017ed1ec
font_01_sfnt_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 10600 bytes
SHA-256: 11969f7661f799f57fa02f84dee1f552d6cb7d4411b1c29e2e10c52e8b1d2a93