Malicious PDF — malware analysis report

Static analysis result for SHA-256 10616655dbed191b…

MALICIOUS

PDF

50.6 KB Created: 2021-01-03 05:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d79267d4a7bcd945b4be389b53293248 SHA-1: 154ea19bb5da79ba83f2f15b52a5037c7943a8f3 SHA-256: 10616655dbed191b72028213264118fb2519ba30d38e62f3ceda347018a5c99e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, with one prominent URL pointing to 'traffking.ru', suggesting a link farm or redirection scheme. The presence of PDF_SEO_LINK_FARM heuristic further supports the attack pattern of using the document to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8992

Heuristics 4

  • 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.
  • 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/aws?utm_term=andries+vermeulen+in+afrikaans PDF link annotation
    • https://gomibabojusul.weebly.com/uploads/1/3/1/4/131483197/8916429.pdfIn PDF document text
    • https://bovitala.weebly.com/uploads/1/3/4/4/134497817/932a0a7b4c4b596.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/tobomake_fajeduvewezan_kuwewafo_mozinotibirobi.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/buduwopubovedovesuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f9a7213db0e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f91cf83cd601.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/865ae2de-dd92-4d6a-8005-100cedc5817f/42830835359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c213c968-d076-48dc-a7e1-cd17c125cf58/71547239259.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/12279173764.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/34565757079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdefc4e4-a8c5-4c5a-92a1-7be0bd1613ed/rotinanovejimozope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5703adef-1c9c-4e34-b99e-5611f007a33c/sonic_2_mod_apk_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0542b42-3437-45d3-bd89-5455bc2969f6/debitelujikavobewo.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EE 5164 bytes
SHA-256: 9c66ef43137fb9da1f474830899873b413099f9995bbb5a44c311b01308d7f51

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