Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4b5a3ed7b3dcc4…

MALICIOUS

PDF

72.2 KB Created: 2021-03-02 09:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1cbea92ad8651cf9f337c01c98b0c201 SHA-1: 4668fdebdc3d8982a397677975ef3e72b2d1d0fc SHA-256: 2a4b5a3ed7b3dcc43bce4809cfb0edee3907e5dd81aad07852a956548775d20a
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, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to 'black ops 3 shadows of evil ritual guide', aiming to attract unsuspecting users.

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/wix?keyword=black+ops+3+shadows+of+evil+ritual+guide PDF link annotation
    • http://lomigakorak.getenjoyment.net/an_introduction_to_applied_econometrics_kerry_patterson.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/junie_b_jones_and_the_stupid_smelly_bus_online_book_free.pdfIn PDF document text
    • http://bulakirip.getenjoyment.net/6111671391.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/ajgjahg/new_bollywood_songs_ringtone_2019_download_mp3.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/77411297690.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/50595435728.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/fIgibE9/how_to_lock_secret_notes_on_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/tesikotuk/hhdgi4o/hempire_plant_growing_game_apk_mod.pdfIn PDF document text
    • http://mon-compte-cmb.best/how_to_unlock_black_diamond_spot_headlampqtafi.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/83892055436.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/84299344852.pdfIn PDF document text
    • http://davorivugexawu.sportsontheweb.net/53331289115.pdfIn PDF document text
    • http://vozobatenaw.mywebcommunity.org/nomudod.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/zoluwivebiro/asylum_for_the_feeling.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/cabinet_hinge_drilling_template.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/86200011971.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/30024970362.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/99905024538.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/remuli.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_off0000de4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4A 5848 bytes
SHA-256: c84c41c6c49aee308ea83ca3a7b76592d9c83344bf08a47fd3078edf5d1d4af5
font_01_sfnt_off0000f24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 9780 bytes
SHA-256: 9106695e448102752c98b8c30b56108ae569c4eb81365ffd7d9db0eeb53b6ad2

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