Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fca5b2df98eadbc…

MALICIOUS

PDF

68.8 KB Created: 2020-12-26 07:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ac9c5601d5a9f76ab08688b59ea4b48b SHA-1: e9b994ec48c9253455e7f240fc21fa65a0d74f38 SHA-256: 7fca5b2df98eadbc13eff179ceca3859f9241b88fcce27486b33b3806d1b5a28
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that leads to a suspicious domain, likely serving as a lure for the user. The document body, though heavily obfuscated, suggests a topic intended to attract clicks, aligning with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=should+i+stay+or+should+i+go%253A+surviving+a+relationship+with+a+narcissist PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452865/normal_5fb582ec52286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f9565953b99c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fc8de8072dcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5fcebbe44ec54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404293/normal_5fd043428ce0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f8bba2d47d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_5fb9ba75f0cb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_5fa4809d2cbe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381347/normal_5fa251a97ac01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420775/normal_5fe25cfe8e246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5fa00d58c6c1e.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/wanasuvedigo/68331709000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bee8e4a-e4e4-4d2e-8068-308a06c225d0/snow_emergency_levels_lucas_county.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/rodegojapep.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_off0000cd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD87 5740 bytes
SHA-256: 6dcf6e72104f7590a9d0f46cc1bb4d532a62e1bee4edba64bf22b123736ec7a3
font_01_sfnt_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 10696 bytes
SHA-256: c435b9d61c37d88a976cc8f74a7e69c4e35a9feba6259876238c37317ae83291

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