Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58c7847a6892001…

MALICIOUS

PDF

70.4 KB Created: 2020-11-25 09:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e05327ab33a8e1d801513c6740119c SHA-1: 1797aeaf1ac4f6c2bf4c61d0651366910a9c9194 SHA-256: f58c7847a6892001f921233057cdcaa4e00b81fc9a864beeb0db894c78543c89
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a 'plant vs zombies mod apk' URL, suggesting a lure for potentially malicious downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=plant+vs+zombies+mod+apk
    • https://cdn-cms.f-static.net/uploads/4465394/normal_5fbc2c3164d22.pdf
    • https://cdn-cms.f-static.net/uploads/4415768/normal_5f9a4ade11eb8.pdf
    • https://fukituxepuronip.weebly.com/uploads/1/3/4/6/134605821/verilut-fubikaduvup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/memul/88677062984.pdf
    • https://s3.amazonaws.com/vebogotexaf/b612_beauty_filter_camera_app.pdf
    • https://uploads.strikinglycdn.com/files/4364034e-e41e-4bd3-b84a-30c98b74b413/69433933812.pdf
    • https://s3.amazonaws.com/takateg/languidez_definicion_medicina.pdf
    • https://s3.amazonaws.com/sinadi/85414640349.pdf
    • https://s3.amazonaws.com/fidefofudi/godak.pdf
    • https://s3.amazonaws.com/juxatop/69246572075.pdf
    • https://uploads.strikinglycdn.com/files/349d7ad4-e522-455a-b7db-ac491e6167ab/fisher_price_zen_collection_bassinet_recall.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d5.bin
8450441c8b0dd68c538f296cba90e2b236b56abebea55403dca0cfc7d38aa1c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D5 5324 bytes
font_01_sfnt_off0000e6ec.bin
bb4f2f86658fa09058c2bde08d9e57bc867396689522a89510887fdf9c0221bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EC 11312 bytes

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