Malicious PDF — malware analysis report

Static analysis result for SHA-256 60993cdd798f9297…

MALICIOUS

PDF

80.6 KB Created: 2021-02-22 00:16:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c8cc7547d28e6aa8af3d4d74d6bbe013 SHA-1: 8ed62e7009802451fde04889918459f5690e10e5 SHA-256: 60993cdd798f9297b4afb2420cd8126f31443c71a897f5ed9846a1b4cb7290d4
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a spearphishing attachment used to redirect users to malicious content.

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://jacksth.ru/wix?keyword=play+pacman+xon PDF link annotation
    • https://bazifimu.weebly.com/uploads/1/3/4/6/134661545/11d0a00ac.pdfIn PDF document text
    • https://watilokid.weebly.com/uploads/1/3/1/8/131856522/wonefabajidab.pdfIn PDF document text
    • https://fibetenozogu.weebly.com/uploads/1/3/0/8/130813768/dofusok.pdfIn PDF document text
    • https://zatakigufexip.weebly.com/uploads/1/3/0/7/130738978/zujifukaxagu.pdfIn PDF document text
    • https://cdn.sqhk.co/vikaxokaso/kmgcja4/holy_land_wars.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/gc8hjhj/aesthetic_tumblr_backgrounds_yellow.pdfIn PDF document text
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/kegod.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/jhd8uUj/golf_clash_tommy_fall_major_rookie_wind.pdfIn PDF document text
    • https://livesagu.weebly.com/uploads/1/3/1/4/131437401/1593035.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/zosevid/jcb_backhoe_loader_parts_manual.pdfIn PDF document text
    • http://pepebejawu.epizy.com/hp_laserjet_pro_400_m401dne_service_manual.pdfIn PDF document text
    • http://gaxugozoj.epizy.com/afsar_full_movie_mp4_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/basics_of_cost_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/free_online_cctv_installation_training.pdfIn PDF document text
    • http://patuwovoparivi.rf.gd/california_law_reporting_car_accident_to_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/badger_5_garbage_disposal_replacement.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_off0001001f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001F 4976 bytes
SHA-256: 96ecd21f8e2a72b6915711a8f39dde7cf525d743bc2466e4a7ddc141e9c441f4
font_01_sfnt_off0001110f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110F 10704 bytes
SHA-256: 83232b86d5147dd778fba4ecc6dcd92d4290510970ac4e389e43964f5ae79448

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