Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5e278aef7406c3…

MALICIOUS

PDF

67.0 KB Created: 2020-11-19 04:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9e4dfadeb2b2ccdf50a71aaeacaa6821 SHA-1: 92719858ee280a95d9700c9156adbb263c2a6db1 SHA-256: 6f5e278aef7406c3c0563e49cee9c51cd63be9b6b43820f0d3f3a18c7374862f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=birthday+song+status+video PDF link annotation
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/varukovomat-dodobikajifip-judenumimutep.pdfIn PDF document text
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/fajosofi_mafofasa_kobexipadib_sifoned.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/vegoluruwigepok_fepuxagasovotal_xubezekiwajas.pdfIn PDF document text
    • https://roruzutal.weebly.com/uploads/1/3/4/5/134592711/523315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_5fad7f76f0a94.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/xurejetexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_5fa69fd62e791.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/bd76c54e-6b36-46e7-a15d-1af8b4336a78/naxutupijodovujekomigos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64e34ce-90cd-448a-9df4-80f8acae0ebd/51194478760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74998ee3-a4f0-4923-afbd-a09648c44440/gta_4_save_games.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_off0000c71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71C 5268 bytes
SHA-256: ce67ad981fc20d4f1e5b84783f532c1c2894d9cb649465a5350da4354594a7cb
font_01_sfnt_off0000d90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90E 11364 bytes
SHA-256: 7eea325e6a3eca44ca9e11b5d4c03bb11d836506715140c403d497fa751a7fe7