Malicious PDF — malware analysis report

Static analysis result for SHA-256 98138c54d7cd0841…

MALICIOUS

PDF

71.3 KB Created: 2021-01-12 12:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 83ca8b0086d0d66f0ccd52d2c8ed2553 SHA-1: 4c6ffac6aa2e9765cb83e1bdee8897a513187065 SHA-256: 98138c54d7cd08411ae47d7cc5f81832a76c07299b61f8f8143dca7bc707921b
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit vulnerabilities or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=ambari+movie+all+songs PDF link annotation
    • https://katolafafesol.weebly.com/uploads/1/3/4/4/134479470/6fe8b0b8b45a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_5fb2a4b5b2930.pdfIn PDF document text
    • https://tizusetupo.weebly.com/uploads/1/3/1/6/131607013/dijupixataki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f96b5e783ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491686/normal_5fb41ca060f3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_5fa380a3a1381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465935/normal_5fb446dc2ffa9.pdfIn PDF document text
    • https://fimekubolutad.weebly.com/uploads/1/3/4/5/134585071/woxisixadikuru.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/ruzumeb/guvewixaloropelavusupid.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/learning_colours_printable_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/mouth_cancer_symptoms_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/participial_phrases_worksheet_with_answers.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_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 5196 bytes
SHA-256: ee4574f2a1696714cb7801ebacde829e04ee40b8591569b22564c68a3753aac7
font_01_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 11160 bytes
SHA-256: ecac4faa08e25ec252c3947693ffb6fa92a38428300e3d33acf9e4df03e20ca3