Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f064e3d712cbfa…

MALICIOUS

PDF

74.2 KB Created: 2020-12-26 21:10:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1f940361eb375a227f00d8bea78f5ff0 SHA-1: 21d0e9b1a5429b7ceb9c460d4f64b46cf8edcec4 SHA-256: 54f064e3d712cbfa3c29bab4e729aeb3dd5fd6fc22dde6bb6150e4c7e4b2ba5b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'trafftec.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=fpv+freerider+full+free+download PDF link annotation
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/8241086.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390659/normal_5fc84b9458dc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_5faa212f23fbc.pdfIn PDF document text
    • https://megidawuxuta.weebly.com/uploads/1/3/4/7/134729580/dexavuwipiwa-tozuwikagebema-zejujapikojere.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/baxekojojexusol/79434529858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3039ca5-884d-47aa-b2f8-38deea1fa258/tavamasufeborepif.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/xikotakojojude.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/xevegakupu.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/middle_east_and_north_africa_map.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/kolubapufi.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/formal_letter_uk_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/8th_grade_reading_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/gmat_official_guide_2019_ebook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/analisis_bromatologico_de_pastos.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/91971618217.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_off0000e60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 4964 bytes
SHA-256: 8f2824d80761c598ec5519adbea2131a789385dd929b763d6bd206f7625306b9
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 10308 bytes
SHA-256: 1f86918064926c1bfe1964514409b5810ba68595adf50d123ab902ce2a9ce4ac

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