Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe34d2966dde5df…

MALICIOUS

PDF

75.7 KB Created: 2021-03-27 15:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1d2a00eca95838c8149a0db03886f5c SHA-1: d2785d1994e92a3286d8555dc5700c57e09e6c7e SHA-256: bbe34d2966dde5df1a932083e87ece9559b084a30d6a69aac47a32d2400f01d4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document body and heuristics reveal a link farm containing numerous external URLs, with one prominent URL suggesting a phishing lure related to forgotten credentials. The presence of embedded URLs and the nature of the link farm indicate an attempt to redirect users to potentially malicious websites for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=forgot+ipod+username+and+password
    • http://wativeb.mypressonline.com/dapozuwibezanoxefu.pdf
    • http://zakomuxoza.getenjoyment.net/27369888734.pdf
    • http://xojuxelase.medianewsonline.com/87064127302.pdf
    • http://lazirog.mywebcommunity.org/94071616219.pdf
    • http://kovafuwir.getenjoyment.net/651681815.pdf
    • http://sagunutu.medianewsonline.com/bayan_tariq_jameel.pdf
    • https://cdn-cms.f-static.net/uploads/4371790/normal_604713d959010.pdf
    • https://cdn-cms.f-static.net/uploads/4380700/normal_601bda20dc592.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://beliraguw.onlinewebshop.net/banking_exam_english_book.pdf
    • http://jemileti.atwebpages.com/gameshark_cheat_codes_pokemon_emerald.pdf
    • http://xamukipadu.myartsonline.com/boxukaju.pdf
    • http://dijipola.onlinewebshop.net/asatru_edda.pdf
    • https://s3.amazonaws.com/zuniverijesud/mogipo.pdf
    • https://s3.amazonaws.com/wavunot/dokiz.pdf
    • https://s3.amazonaws.com/kufazete/87102145034.pdf
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_c76923fd6f4e40b2b5415fee06f3dfb2.pdf?index=true
    • https://s3.amazonaws.com/jusuberu/momus.pdf
    • https://s3.amazonaws.com/nevovumowa/58004028811.pdf
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_3b4baacae7f3482c94ca685eded23a82.pdf?index=true
    • 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_off0000e8d3.bin
94ed490224754fb05e55ba95479f43fc58d6454e02dc75b01a5494802e327f49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 5296 bytes
font_01_sfnt_off0000fad7.bin
83a7f975dc1c1f50558ee18c0f3bfd55ddbf209a23c478dd222c692a2399632b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 10992 bytes

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