Malicious PDF — malware analysis report

Static analysis result for SHA-256 15647074f6b400c8…

MALICIOUS

PDF

72.3 KB Created: 2020-11-22 18:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96461c2351d98c802bcd9dc1561c32dd SHA-1: d5dc2d73baf907ea67ebee4ce7947b6459a54554 SHA-256: 15647074f6b400c8e0463718c26435ffc4503714a64908620fbc9bb3107c6a87
254 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Crash bandicoot ps4 pkg' which may be a lure to attract users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gettraff.ru/aws?utm_term=crash+bandicoot+ps4+pkg
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5fb3d289110af.pdf
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5fb81c69d711a.pdf
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/kakegibefokow.pdf
    • https://cdn-cms.f-static.net/uploads/4459164/normal_5fa105af46e93.pdf
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f875ddd27441.pdf
    • https://delutezebojuk.weebly.com/uploads/1/3/4/3/134353455/kavis.pdf
    • https://cdn-cms.f-static.net/uploads/4390056/normal_5faf2c3d4c478.pdf
    • https://cdn-cms.f-static.net/uploads/4463543/normal_5fad256a904e8.pdf
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f97ad9dd6460.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6451c250-6526-471b-8ab1-6834613107a6/34462037670.pdf
    • https://s3.amazonaws.com/taturi/quadratic_sequences_worksheet_gcse.pdf
    • https://s3.amazonaws.com/viboxikuz/zafovifizimugotet.pdf
    • https://s3.amazonaws.com/nademopor/74771242155.pdf
    • https://uploads.strikinglycdn.com/files/cf6b9c98-f0fd-4f10-b74f-65023a89e649/50352216798.pdf
    • https://s3.amazonaws.com/fejatepudopito/lexogevawezofaxetenisudib.pdf
    • https://s3.amazonaws.com/werowibovezoje/formic_acid_proton_nmr.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c107.bin
6b13a8b7df135700c718501c2d94799a060fc98b91f636575a1a3744f1f17173		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC107 5288 bytes
font_01_sfnt_off0000d2ea.bin
f8124fb93824bc76eb41b1f0a20b9c3f0a67febc05e6481e6631a7c5fc529f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EA 15972 bytes
font_02_sfnt_off000103ff.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103FF 4324 bytes

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