Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45a63a092b4a324…

MALICIOUS

PDF

65.9 KB Created: 2020-11-12 00:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 32c12d53ee6bd451e56cb986599ec300 SHA-1: dedae7a0c990794d5236680dec368c8d4beb1361 SHA-256: f45a63a092b4a3242fbce8e8dba7d7378da2601e208c3f1be5b1385d8f3a96c6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7065

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=octavia+butler+dawn+characters PDF link annotation
    • https://bosaralox.weebly.com/uploads/1/3/4/6/134608385/9fb167.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/2841377.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/361f1966.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/betogigelelage_tulenigebibeze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f960ce1a07fd.pdfIn PDF document text
    • https://xinewufovina.weebly.com/uploads/1/3/4/2/134235071/febubom-dezuki-fanemip.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/jibamu_xekime_gediju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_5faaef3182e49.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/nololedexorafo_gofonojukumotij_zapojajanedujij_josinavojizog.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/bolijodojala-dulobufizixojux-silas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8881c117091.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vunizi/rudobezumejirutatubimijad.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/tifakopakuwuripivuret.pdfIn 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_off0000d008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 5348 bytes
SHA-256: 3571f2f2289d472945fecaa27da2954878aff18d3fbb7bfe995c487d61e361c2
font_01_sfnt_off0000e239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE239 9968 bytes
SHA-256: d3d3025a474fe0d88ccd3b92570deb9690722a42d6c37d9253b330d2ab6fd4c9