Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7a784b06d728a0…

MALICIOUS

PDF

69.7 KB Created: 2021-01-03 08:26:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ca9862f94abd553c5a83995616ea5b2 SHA-1: 7ee09f136fa4d77f29a35c051a8a3ee95ba210eb SHA-256: 8c7a784b06d728a0b35700cbdf91d492b56098560a6d5d00cd412bac0bbf4619
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified as a link farm, and a specific URL related to coffee grinder settings. ClamAV and ML classifiers flagged this file as malicious, indicating a phishing or malicious content distribution attempt. The presence of numerous external links suggests an effort to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

Heuristics 4

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=bunn+coffee+grinder+settings
    • https://cdn-cms.f-static.net/uploads/4455642/normal_5fbb46785bcb8.pdf
    • https://cdn-cms.f-static.net/uploads/4446401/normal_5fd1d369dad24.pdf
    • https://finirawex.weebly.com/uploads/1/3/2/7/132741073/9415319.pdf
    • https://cdn-cms.f-static.net/uploads/4420748/normal_5fbbefee5b3c5.pdf
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f8d9732ac891.pdf
    • https://denapifikuzo.weebly.com/uploads/1/3/4/6/134634031/9864514.pdf
    • https://cdn-cms.f-static.net/uploads/4467576/normal_5fd7d41a8200a.pdf
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/c06c9a101a.pdf
    • https://wevupifusa.weebly.com/uploads/1/3/4/3/134356286/3822842.pdf
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/bozuzikuvaxufeku.pdf
    • https://kadukutinebi.weebly.com/uploads/1/3/4/7/134747046/zuvitut.pdf
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/591283.pdf
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5fbb863cafaef.pdf
    • https://wuginimujewege.weebly.com/uploads/1/3/4/7/134714977/ce763f4386.pdf
    • https://vivusujode.weebly.com/uploads/1/3/2/6/132682813/metafojakof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f948.bin
8c3d9576cd256aea0caec2dbbb6fa5bac093eb620003741b5760d88cd3015d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 4876 bytes

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