Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d7f3d49f034321…

MALICIOUS

PDF

74.1 KB Created: 2021-02-14 04:31:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aebc85903d744c3a16b17cd564e4d446 SHA-1: 3a1fae9458f0d9bae229516087f8f65d10120e2e SHA-256: d2d7f3d49f0343213f1ab7fd47e27f9bfc94dcbd60c611ca84c31d6339add060
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains a large number of embedded URLs, many pointing to disposable hosting or link farms, suggesting a tactic to obscure the ultimate malicious destination. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

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 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://maypoin.ru/wix?keyword=trivial+pursuit+trophy+guide+ps4 PDF link annotation
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/2989388.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/3846440.pdfIn PDF document text
    • http://daniele.store/testosterone_metabolismd3z5w.pdfIn PDF document text
    • http://limebago.iblogger.org/sijibeluwoburakukek.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/8rdicje/6451358962.pdfIn PDF document text
    • https://dovizitozul.weebly.com/uploads/1/3/1/4/131408131/luzafikubusove-fukaseg-judumagojak-punuvakuxox.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/sitavopeno.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/1jjtCic/puzzle_dragons_wiki_skyozora.pdfIn PDF document text
    • http://tepuragebu.iblogger.org/cartoon_love_couple_hd_wallpaper.pdfIn PDF document text
    • http://smirno.life/63575633068tfkwc.pdfIn PDF document text
    • http://sizegivip.22web.org/higher_degree_polynomials_worksheet.pdfIn PDF document text
    • http://liseravuziw.22web.org/beamng_drive_crashes_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/hhpXhc6/30_days_lose_weight_workout_for_flat_stomach.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lotawovuvowuk.rf.gd/gonidu.pdfIn PDF document text
    • http://mubadel.epizy.com/storyboarding_for_animation.pdfIn PDF document text
    • http://mazogatu.epizy.com/37033676169.pdfIn PDF document text
    • http://bomafedugu.epizy.com/mixegakubi.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_off0000e40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 5420 bytes
SHA-256: 5d749264f45a71f02d8767077900bf23e0c7e509edd3f2ef655ad45f731e550a
font_01_sfnt_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 10876 bytes
SHA-256: 05b3822840a1fc52ec27ef5e13d79e0d1c3dab0a82ceb037d9f987a271750e60

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