Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0fff7bd3d5f7e4…

MALICIOUS

PDF

72.8 KB Created: 2020-12-27 12:04:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce05e31dc21c58ad30aaebd091f59b27 SHA-1: ea165973a286de6a6292123a55df33b3a1757332 SHA-256: 3d0fff7bd3d5f7e4a2464acb30ad8434ade0e863e70c7092d1805168dbf81de5
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains a search query that aligns with the external URLs, indicating a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=battery+operated+lights+with+timer+outside
    • https://cdn-cms.f-static.net/uploads/4454977/normal_5fc1f2e80276f.pdf
    • https://cdn.sqhk.co/xojafimib/ajj3hgS/tefimigexu.pdf
    • https://kilekawu.weebly.com/uploads/1/3/4/8/134857711/kowititirupoxat_jogawukebev.pdf
    • https://cdn-cms.f-static.net/uploads/4387040/normal_5fe7a9ffa90bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vuxagixil/numero_para_reportar_extorsiones_estado_de_mexico.pdf
    • https://uploads.strikinglycdn.com/files/bb680258-5361-4221-b8f0-ebe140ff8369/samurai_warriors_2_gameplay.pdf
    • https://s3.amazonaws.com/wutogugej/boxupawewanagev.pdf
    • https://uploads.strikinglycdn.com/files/72fe7c51-022d-45a2-93be-09c591669a19/51273095450.pdf
    • https://uploads.strikinglycdn.com/files/3d7d5e4b-1731-42ff-9c85-fce4fa148083/74426495702.pdf
    • https://uploads.strikinglycdn.com/files/3daf65e9-27bf-4587-830e-0871455cff67/77963160570.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe1.bin
3f17d9467bb37d67cabb316d629c9568b2660ba7df54f4a681a13000fd809cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE1 5616 bytes
font_01_sfnt_off0000f2e7.bin
ee6ee5592de9a2e032bb0663bd44c961be035e42a4ee4653322b2473e270ea3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 10344 bytes

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