Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62af386dae0ce1f…

MALICIOUS

PDF

68.1 KB Created: 2020-11-10 21:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d7cb1bc4c0733d1c95888dc5f6a0536e SHA-1: 1f36fa7b03538f446a0c714ddfed6acbc319adde SHA-256: c62af386dae0ce1f1f750682acaf18a20e17adfa81ed02a86540dacb12d62136
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it is part of a link farm designed to manipulate search engine rankings. It also contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with phishing or malware distribution.

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://trafficel.ru/123?keyword=akito+the+exiled+3 PDF link annotation
    • https://majubatu.weebly.com/uploads/1/3/4/2/134265851/3d739305.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/nafosov-famedude-jilowep-zagikakigatod.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/2631726.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/gikuxi.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/4503566.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vunidixeviro_xitosujitupile_kadape.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/13ac0789-fbfb-4f70-9ffd-51c91b20789e/2011_speed_triple_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/the_complete_penny_stock_course_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/adobe_illustrator_bahasa_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/85937387493.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/10968477019.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/87367125241.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/lebubekujumi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/deposidu.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/gta_3_download_for_android_apk_data.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC553 4396 bytes
SHA-256: ae59c9906ddec46e9525bef73959bae9a33a227eaa2e460e6738dfc845bc0ac1
font_01_sfnt_off0000d455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD455 9720 bytes
SHA-256: fe9c6da7cae17b4e610adc23546be068bba6b86dc3fce66d01df7e3a68f52c82
font_02_sfnt_off0000f579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF579 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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