Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9a484af7d5fd76…

MALICIOUS

PDF

68.9 KB Created: 2020-12-18 11:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 62669c9ee3718198a882addb127e5dc7 SHA-1: 7a9f0b7a93165d720bc95a63a197d9b16f7243d4 SHA-256: ba9a484af7d5fd76040179ed407aa8a221cade14713bc269fc8281ec4e5a7496
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary malicious URL identified is trafftec.ru, which is likely part of a phishing or scam operation. The ML classifier and ClamAV detection strongly suggest malicious intent.

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=refrena+tu+lengua+de+maldecir+pdf+gratis PDF link annotation
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/daaea8ed4.pdfIn PDF document text
    • https://pejijogukuto.weebly.com/uploads/1/3/4/7/134768892/misukalu_lebinose.pdfIn PDF document text
    • https://kuguzozivef.weebly.com/uploads/1/3/0/7/130739994/ragisoxinuvojad.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/falufusu/65036043029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/990f8ebf-648a-497d-90e4-e75c86b835b6/guvoxevulogujinirize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c039300-b5a8-4165-bccd-3c53a12975da/coordinate_grid_picture_worksheets_for_5th_grade.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5559ebd14ff0dd2ba110b/t/5fc6da7b0623334b0c4e903e/1606867580274/video_browser_downloader_ios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ff8a7d0c8f249d5b3222/t/5fc65b0ee6d49a06bb6c04ee/1606834960366/art_of_war.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ada1c89e1c4b8fdf3d5c/t/5fc61cf73f75b16643a5287b/1606819063901/seporabelovikitido.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf50d9a97599144eedf868/1606373594648/zufud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53589df132613bbd9bff0/t/5fc60d87f3de5e49b534b985/1606815113912/bass_guitar_notes_strings.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7ab43778af068263feaea/t/5fd1d2b587bef85997ef6f7b/1607586492243/tezotitukivifaxet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed17f7cf8c75402b0ccf/t/5fc11e2c7acac6192ae8af10/1606491693717/fijedudamowi.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_off0000ccca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCA 5484 bytes
SHA-256: 028cb633c36a24c613b2d0686d2a48382aa41204eea75f7c5c3fc195a5b83180
font_01_sfnt_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 11664 bytes
SHA-256: 296c7cb894728dd4b78693a22119bc18729ccc586c2ebc82789f9bff3f0c3cb5

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