Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8dc82b0e9a5ca12…

MALICIOUS

PDF

99.8 KB Created: 2020-12-31 12:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ae44e8f2130ed1c7282ce654d73c02f4 SHA-1: 2fd0882faacb264035dbe10ff5733ef621b5de5c SHA-256: a8dc82b0e9a5ca126eb0d1e3e57f5dc1cab86d66f586a642b1e6b5049ef619a4
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 flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffine.ru', which is likely part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://traffine.ru/strik?utm_term=blackboard+open+lms+plugin+matrix PDF link annotation
    • https://cdn.sqhk.co/zokasejiz/5gdjfUi/40273936466.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390680/normal_5fdeefc5004f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406216/normal_5fdc2855c35b3.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/4zieSAD/death_racing_game_2020_download.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/75b4b36a-7d44-47a3-b823-500bd58c902e/65785544571.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/nakopujolovazuruwis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dfc321e-733d-494f-8c6b-979b0c7c982c/najebof.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/36513314387.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/latest_bollywood_movies_free_mp4_hd.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_off00014876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14876 5716 bytes
SHA-256: 3a7cf69c5039307e2a9604c4fbbd7fdcba6b50ba3003cb204dd4511f482a95d3
font_01_sfnt_off00015bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD8 11528 bytes
SHA-256: 6bce1fb1e72852339d15951c4abcdb931c9291c6218bdc12f9cb624382d05f97

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