Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a1ebb65cc73c30…

MALICIOUS

PDF

73.7 KB Created: 2021-01-12 22:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a26a671b1689c3f1f3c24284b3689875 SHA-1: 790319ecd8eb746733074fd6a5e7e0a8c4d31ebb SHA-256: 33a1ebb65cc73c30e485ae98f708bdb6453a1a7b11ac16696bbcd208529f41ff
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a 'PDF_SEO_LINK_FARM' which indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute content. One of the external URIs, 'https://trafffi.ru/123?utm_term=tapped+out+mod+apk+download', is suspicious and likely leads to unwanted software. The ML classifier and ClamAV detection strongly indicate maliciousness, pointing towards a phishing or trojanized PDF.

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://trafffi.ru/123?utm_term=tapped+out+mod+apk+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375077/normal_5fdf7fab38e5e.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/Bhiidhf/xufamogisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fab28fc848d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446015/normal_5fe0444ee6252.pdfIn PDF document text
    • https://cdn.sqhk.co/vonixilavot/eiaZiju/exterior_house_painting_cost_bay_area.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/Ciiicia/when_does_the_stock_market_freeze_trading.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/iekjiIf/brick_breaker_game_blackberry_free_download.pdfIn PDF document text
    • https://site-1166084.mozfiles.com/files/1166084/menerufamezupowuxurutoz.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/0qcijge/cool_phone_ringtone_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/ihpjahz/car_driving_simulator_unblocked_games.pdfIn PDF document text
    • https://dozumudokasalog.weebly.com/uploads/1/3/4/9/134902229/mapadepatofodop.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/teximikamukubo/43796656951.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/81102679812.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_off0000e438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE438 4936 bytes
SHA-256: 1893c1f13e9a787dc7e09ea00ac5e1376aa043f075a8b606ce6d94985a045d4b
font_01_sfnt_off0000f50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50A 10656 bytes
SHA-256: ea8d12b9beadad77357d57d8113540bed5a99613d7a74ef37c54dcb04c1421c3

Open this report in the interactive analyzer, or submit your own file for analysis.