Malicious PDF — malware analysis report

Static analysis result for SHA-256 319e4a11ac49967c…

MALICIOUS

PDF

73.9 KB Created: 2021-01-10 21:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7448e35949f0bef767b3aa40a13d9a9b SHA-1: f1349b6eabc9a20a4fd90194e08726e95791acb7 SHA-256: 319e4a11ac49967c833b61cdafa18f34b5244bed7919d00170f6bb9731ab5d2b
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an external URI pointing to 'trafffi.ru' with a keyword related to Gmail accounts suggests a phishing or credential harvesting attempt. The document body, though heavily obfuscated, contains metadata related to PDF generation and potentially misleading content, reinforcing the phishing lure.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/wb?keyword=gmail%20app%20android%20multiple%20accounts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404723/normal_5f9553aa8c820.pdfIn PDF document text
    • https://site-1168029.mozfiles.com/files/1168029/the_cw_channel_number.pdfIn PDF document text
    • https://site-1177275.mozfiles.com/files/1177275/hsbc_expat_explorer_report_2018.pdfIn PDF document text
    • https://site-1188059.mozfiles.com/files/1188059/bingo_in_glasgow_city_centre.pdfIn PDF document text
    • https://cdn.sqhk.co/jafipago/bybkgiY/lopogoduteko.pdfIn PDF document text
    • https://site-1175316.mozfiles.com/files/1175316/yellow_floral_wallpaper_uk.pdfIn PDF document text
    • https://site-1168169.mozfiles.com/files/1168169/tedizebegujazepewowademi.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/jaxesabi/jafiradapadis.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/32958640437.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/private_car_sale_receipt_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/dukofomabeleraf.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/guitar_solo_guide.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_off0000e49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49F 5252 bytes
SHA-256: 76c64de40382d3e32251c5fa3db78a51d252d173c76bfd44c7eb5dfe93577d1f
font_01_sfnt_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 10596 bytes
SHA-256: ffa9abd4c73b0750fcf2789739b1886a3b808e7c30d445d5d5911ffdb5f1e107