Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ea18eb5c298558…

MALICIOUS

PDF

74.4 KB Created: 2020-12-06 19:58:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f95e68c557d144963c814c84ff33d87b SHA-1: 439c587b209929c0ef6f4898cab484f506c880dc SHA-256: a4ea18eb5c29855879f8041177f49edba71ac9c3814c418c24d23b3a91fcb2f3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to 'trafftec.ru', suggesting a phishing or malware distribution attempt. The PDF structure and the presence of embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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/strik?utm_term=ff14+paladin+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f9b8af23e8c0.pdfIn PDF document text
    • https://wofuzokekaxan.weebly.com/uploads/1/3/4/4/134465278/41513.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/geradi/25166153443.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/nodazabobovobonodugiwudu.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/meme_sheet_music_for_trombone.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/todirikubojoneziseji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee537cde-0be0-4c9b-84ab-a29e9671d113/gebika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0182aa8e-6479-4b50-927d-c89b64384931/68707641687.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/wyoming_board_of_medicine_license_verify.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/pugunugog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7adea64-8fcc-4081-a305-152b95c9c28e/78330924810.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/73036318953.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DB 4720 bytes
SHA-256: ca13d68b010f3b09634db5754d1f42c07bfb2b3529eb7d697f808199f1f4b9e1
font_01_sfnt_off0000e9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 10808 bytes
SHA-256: 0b1a2b37d29cfdfca980beab9cf1124f9cd137ede2ae27d39b25449f2a362d5e
font_02_sfnt_off00010eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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