Malicious PDF — malware analysis report

Static analysis result for SHA-256 48731833ea757a2a…

MALICIOUS

PDF

73.1 KB Created: 2021-03-03 05:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7f184b784d5aeb7c81929e7716a87519 SHA-1: 0e33fe104a367f64152b07b85119d61d6682cd81 SHA-256: 48731833ea757a2a862b812e21101fd3ea6ff92a132af788e0cb94978852097b
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a deceptive lure related to a movie trailer, designed to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/aws?utm_term=when+rabbit+howls+movie+trailer PDF link annotation
    • http://waliduv.mypressonline.com/96_yamaha_kodiak_400_carb_adjustment.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/bb2rlha/file_manager_app_for_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/htjfgdr/lebuzigututowexefebi.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/dododiremotixud.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/j2gfibD/67844397900.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/zarodunelat-wukedefe-ruviti-mitatoj.pdfIn PDF document text
    • http://memisada.mygamesonline.org/zepujuwemadisazesopu.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/jesejovevodokakizuxi.pdfIn PDF document text
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/f82bbeadd7b.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/sixolose/89539389868.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/funup.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/bandbudh_aur_budbak_official_game.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_off0000dfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC2 5228 bytes
SHA-256: f5c29d6b353e46b81f641e162e959033b63bf83efddf62a6339446658e30e630
font_01_sfnt_off0000f175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF175 11168 bytes
SHA-256: 7967c9c42a6fc163144e789e2bfc903036aa064fc69dada9f173b525a84789f2

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