Malicious PDF — malware analysis report

Static analysis result for SHA-256 f901696ac5996432…

MALICIOUS

PDF

77.3 KB Created: 2021-01-02 12:03:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b322c87d8dba2bca0c64358ce9a7aa9a SHA-1: 9a2111fd0728757f6d3b009c85a1317023c137ee SHA-256: f901696ac5996432ccf74d8469a7b057be96ceebd10c4dc25852a94ac8734f42
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'fishing report'. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly indicate a phishing attempt.

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://traffking.ru/aws?utm_term=dnr+mich+fishing+report PDF link annotation
    • https://cdn.sqhk.co/punenekebi/hhetRgi/12126803165.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/ifgcXhg/14827094274.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/ahaiiaI/gulaparevusabinor.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/23Riihe/drumset_notation_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489588/normal_5feb9a4628ddd.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/314c3fe6-52e3-4a5e-afdd-7bad77942139/42813946364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1f094b-584f-4dcc-b2e7-14a06290e8e5/the_walking_dead_pilot_full_episode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58f10e7-dc4d-40e3-8f1e-54165f81ad5c/koderid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f78197a-d303-45d1-ad79-28c40fdda9ca/faith_hill_where_are_you_christmas_karaoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c7891c-65bf-4d8d-a7f8-67cc79234c3e/madden_mobile_16_hack_no_survey_no_download.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/siwefuvomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aeedfde-e0bc-4a4d-806c-a6707a7a6539/71133182358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1194a1f-65ae-48b9-8bde-580d11809196/sidelazivupofebor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14630e4e-cfde-4699-9921-47ba0aefc817/witcher_3_gesnge_eines_ritterherzens.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/momaguzegezuwovup.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_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 5188 bytes
SHA-256: 7372ad389653da4def0472fc7593e8e800934cd469a36ad6e19470b05a8b8c6d
font_01_sfnt_off00010639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 10108 bytes
SHA-256: 617603c424fc9dc14140c49f794d336bfcff3059775c79158ecaec6dbc80feb3

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