Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff3a12f707b8061…

MALICIOUS

PDF

58.6 KB Created: 2020-11-14 10:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 909e3f4721d525927a7510273d4a4b99 SHA-1: db74cf9fdc59088d81da0442be641bddc37a7647 SHA-256: 9ff3a12f707b806160b4e65b69246c2857aa61c82b916473df9e97367ae5b15b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'popular science'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/strik?utm_term=popular+science+august+1931+page+23 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471230/normal_5fa4370a97304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f8c9523c260e.pdfIn PDF document text
    • https://kuxilididid.weebly.com/uploads/1/3/4/3/134387830/ef81f0849b752cc.pdfIn PDF document text
    • https://kejedaxuz.weebly.com/uploads/1/3/4/3/134355680/lawaluwikoxo_xeduzagovowepev_kigigemixebin_sapabajide.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/pamopixatu.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/4521481.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/fejatepudopito/41618081064.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/30353305074.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/jifagosirarepupoxudijo.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/veniliz.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_off0000a863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA863 5604 bytes
SHA-256: 4db08a3848ed391b07719f0b41599fc26c12031f63264fe68697b40160595c0f
font_01_sfnt_off0000bb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB84 9996 bytes
SHA-256: b71777115340e86079ab7d2aee594c3bd5cd0f8a87633c115fa348256a172098

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