Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc842171b12ad8a2…

MALICIOUS

PDF

75.3 KB Created: 2021-02-18 02:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8c112362e42050708a7bc0c833210127 SHA-1: 7c2d32b531607abb561a9f8b1be0f57e6d7a69ed SHA-256: cc842171b12ad8a266ed24194260f69f6b05cbd4242a442fbf09ec75392c7f74
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=briggs+and+stratton+500+series+158cc+engine+manual PDF link annotation
    • https://cdn.sqhk.co/redusebi/iajgwn1/dagalafunofibasap.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/dib12hi/jurassic_world_alive_glitch_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/ggfqyjf/7944886809.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/hiaZGgf/weekend_getaways_near_nyc_in_winter.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/jggcwie/kanto_yu2_white.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/hhdzjcr/25803078526.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/gjiovHE/best_english_dub_comedy_anime.pdfIn PDF document text
    • https://kigekasomek.weebly.com/uploads/1/3/4/5/134598498/nibezegamojixa.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/hlipnCJ/ted_cruz_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/dazenolaxuj/oji0gjM/hero_wars_central_youtube.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/9675619.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/hhgg8ZI/large_cat_condo_cage.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/wufujudisu/22118006783.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/altaf_raja_new_song.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_off0000e2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DD 5820 bytes
SHA-256: 2f08a4afdf6b2623d03c1ed5a47d56d4ca8dde7b4dc80be50296e768e23acc3e
font_01_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 11492 bytes
SHA-256: 0a8b1ad8d93b627e6d656cb97c1ab2f85c594f25eb811d5357861b02ef1f0057

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