Malicious PDF — malware analysis report

Static analysis result for SHA-256 2706784ffa78f0ce…

MALICIOUS

PDF

82.4 KB Created: 2021-03-02 21:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 967e8a146cbe5593b641719dc9b68818 SHA-1: b63f77b1d880afc9700c9300f74db77807c9c71f SHA-256: 2706784ffa78f0ce33f8ce79fc575f23f9a686ce56b64651eb2d0f6d7b418888
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external URIs points towards an attempt to exploit the user's trust through deceptive 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 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://vilenefex.ru/123?utm_term=slave+contract+means+what PDF link annotation
    • https://cdn.sqhk.co/wofetewa/KggjgJw/nigabanowonebiperizek.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/Ao6oii3/62992514459.pdfIn PDF document text
    • https://xowavexinoj.weebly.com/uploads/1/3/1/4/131408618/5404050.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/the_surrender_experiment_course.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/wemulabodiruzogalibuzax.pdfIn PDF document text
    • http://risumeboze.getenjoyment.net/fantastic_mr_fox_full_movie_stream.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/hhvigic/ice_cream_truck_near_me_gps.pdfIn PDF document text
    • https://juwufugoxeza.weebly.com/uploads/1/3/4/5/134528381/burixu.pdfIn PDF document text
    • https://mipapipav.weebly.com/uploads/1/3/4/0/134012398/gufewuduv.pdfIn PDF document text
    • https://cdn.sqhk.co/bezupidokaz/jaWBgev/60539217582.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/wurisevozudup.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/pubopelej/benukujuledi.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/bbg_1.0_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/rikawegejubazelubor.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/walevulotasixum.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/how_to_reset_esi_phone_system.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_off0000f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 4596 bytes
SHA-256: 5afda3bb7605adb1cab03fcb8f09d67362fae1f926b8ef12d180a1acdc55da07
font_01_sfnt_off000104e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E2 5292 bytes
SHA-256: 94f4e6e7ddd96dae85dfc1aea71349173c1066e60aa9d5b5902d90f718bedf7c
font_02_sfnt_off000116c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C8 11052 bytes
SHA-256: 715ae55ff26aedf66bab09731c9a0d2a6719e35987d8a2ffd4951addd26ad509

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