Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f47a9a9d47eaaf…

MALICIOUS

PDF

69.9 KB Created: 2021-01-04 01:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 66238e380fa748147240410011d73d5a SHA-1: ede37e5ac92b39d73c0b3ee2b0a27d646c067eb1 SHA-256: b6f47a9a9d47eaaf5c130dad2a44140fea53df4f4f15d53dbd68af999d7ba157
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a heuristic indicating it's a social engineering attack (ClickFix) designed to trick users into running commands. It also contains a URI pointing to a suspicious domain, trafftec.ru, which is likely part of the attack chain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://trafftec.ru/aws?utm_term=unable+to+format+cd+windows+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8748f9b76d5.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/vegunexozeba-ximajurara.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/dikusutezomamepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497368/normal_5fbdead1ceafa.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/kiwopusafize/spanish_reading_comprehension_worksheets_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102be45b-13d4-4e80-b09b-e54ea3be75f8/rerupetokadatoxurobum.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/charlie_puth_songs_see_you_again.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/browser_for_windows_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ad75ed-e27d-4728-9450-60759807bbc7/moore_theatre_south_haven_mi.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/dsssb_je_answer_key_6_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67029f33-4525-47c5-8133-9681e10519bb/87078768239.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/zexobowuxodikeloti.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/fitagitewidugapafixuku.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD407 5468 bytes
SHA-256: 9ad8e2d1b560e8b273092182c658d5f83c8266903d790deffcf8e80810b22ec2
font_01_sfnt_off0000e6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A5 10716 bytes
SHA-256: 23a1e48fe932e8ee85f63829bb16e4ba761a88557efeee360f2afac902e2ff56

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