Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebcca8cb014d288…

MALICIOUS

PDF

72.5 KB Created: 2020-12-28 15:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a0072507e5245e3cebb4a61fefa0a597 SHA-1: 91040419c23f691faf7e6838d88b62d553c7e337 SHA-256: 6ebcca8cb014d2883c91ee17df6e30126d20c6295cbec18f64c55779be85adbc
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, masquerading as a manga review. This URL is likely intended to lead the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=claymore+manga+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f999dc4af035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5fa84a7e9de03.pdfIn PDF document text
    • https://cdn.sqhk.co/merivexasug/DjahfmQ/zelosofulasiwuwajomema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5fc36f49d550b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_5f9f9996594a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_5f95f6ac46810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420906/normal_5fc493e739321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_5fb3f7aff1667.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/e0c92a8c-9521-4681-b424-36e8edcecb8c/new_england_alliance_for_health.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0802555-938e-44a4-9aa2-9eab57d070a8/marimba_ani_yurugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355184a1-acd0-484e-845a-4d4d7c7d698e/a_space_cushion_is.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad7a79e-85dd-4249-a131-8c2d1929821b/wevuv.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_off0000df87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF87 4984 bytes
SHA-256: 44558bb0ab859f9892c3f160ec340bf5da65aff5cc1b11277484d29216e9693a
font_01_sfnt_off0000f07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 10960 bytes
SHA-256: f82c7f212f4657679714488bfe96f390a1b60255a969d7d4bfa657298ec08b7b