Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6232e42da8cbbb0…

MALICIOUS

PDF

75.8 KB Created: 2020-11-27 16:18:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: aa25eb03a7269049c1ea2230a27fd5f2 SHA-1: d71d38489caa50caed45362f9b7ab9a8e5e225a0 SHA-256: f6232e42da8cbbb01bb467703d6a70f8536c4c72840c2369690809fe6b3c4554
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various PDF files hosted on Weebly and other platforms. One of these links, 'https://traffset.ru/strik?utm_term=persona+3+tartarus+block+2', is directly embedded and likely serves as a redirector or landing page for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=persona+3+tartarus+block+2 PDF link annotation
    • https://mavobomuwatu.weebly.com/uploads/1/3/4/5/134592479/sonogiwetenaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443804/normal_5f9de7911b6e7.pdfIn PDF document text
    • https://neboxikadifi.weebly.com/uploads/1/3/4/5/134588308/7672095.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fad814ab8f1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_5faef12887a56.pdfIn PDF document text
    • https://manoxumumaxu.weebly.com/uploads/1/3/4/4/134472756/2989675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455886/normal_5fb4e13a9801a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fba265c0d30b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421213/normal_5fb5e7ae734c0.pdfIn PDF document text
    • https://genovaxoduw.weebly.com/uploads/1/3/4/3/134388418/rigexij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413000/normal_5fbf5eda63be9.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/ad35706b-555c-4349-8dd9-c7b73d74a5ed/96827586514.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F2 7604 bytes
SHA-256: 93173b25cb0076f77d02dae463a2ae444545a0e68c8b4a556ba9d5415610a7a3
font_01_sfnt_off0000e375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 5292 bytes
SHA-256: fd7421aa614025902444f07097005f374dd86dbd651714b46acfcd6e722d2ccd
font_02_sfnt_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 13228 bytes
SHA-256: 295d205b5696d21f31d53b8d403db97146bc7a41295b196f4a0fb355fbc1a3f6

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