Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced9241c3179268c…

MALICIOUS

PDF

49.6 KB Created: 2020-12-27 03:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 036fbf672931135e4bc8a4d1cf9f21e1 SHA-1: 1cba5e2c3ec5963f09dae2fe62768f12ce7a7cbe SHA-256: ced9241c3179268c6465bbefbb342a2dd4bff6dc4c977110ade2e63c831892b0
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO link farms and phishing. One prominent URL, 'trafftec.ru/aws?utm_term=free+android+sms+backup+to+pc', suggests a lure for users seeking free software. The ClamAV detection and ML classifier flagging indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9296

Heuristics 4

  • 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
  • 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://trafftec.ru/aws?utm_term=free+android+sms+backup+to+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413719/normal_5f9784a22ac9a.pdfIn PDF document text
    • https://biwawabagukolaz.weebly.com/uploads/1/3/4/7/134730268/wijijegegimimuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_5fbf68c520c43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365560/normal_5fe044c0ab40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_5f9d77ed4fc78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464522/normal_5fcdec470889d.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/150e0180-55b7-453b-b456-886af690def7/shinestar_sata_4_port_card_drivers_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c82bb8c-fa9d-42bd-a35f-9599094c2852/daxexawefadapujot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee7c37e9-047c-4b0c-a8c4-e2a8a74c92be/super_mechs_unlimited_money_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb976c5b-43ef-4787-8166-6a16f7d8f919/96545582448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15ae115-4165-48eb-914d-f8fcf172cb91/windows_server_cal_licensing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280fe055-0701-4b84-b2b0-eaa563910606/marinera_y_tondero_ernesto_lopez_min.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_off0000b2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C3 5228 bytes
SHA-256: 32bcfe73f322733a396fddfb73435c28851c290f916fdb14ee4f842f84cd8b86

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