Malicious PDF — malware analysis report

Static analysis result for SHA-256 73efc15453cfed36…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 10:00:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d6cb29c66fbeca2ea5a2c6ebac51907f SHA-1: f9ddf33b214144ec753fa2531e7bc77e0278c485 SHA-256: 73efc15453cfed3644d36ea75d257cf86485a1c8ee8e4ce08f40f59cbb33a3a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which in turn hosts other PDFs with similar lures. The document body and heuristics indicate a social engineering tactic to drive users to potentially malicious content, likely as part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://netcdn.tw/app/431946152/how-to-exploit-roblox-game-hack In PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/unlockmygamescom-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/robux-code-hack-2021_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/free-robux-inago-goay_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/roblox-free-flying-practice-place_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://e-learningmtsn8nganjuk.com/__statics/gudangsoal/files/roblox-hacks-client_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3076 22160 bytes
SHA-256: 0360ed5d5c74172d7b82a2a86f18470aae035ecf7160204c55ab6b2e8c02ddb9
font_01_sfnt_off000061b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B6 19048 bytes
SHA-256: cef7f7dfdeacc4addf37a68d2dbcfd18715a6093397bfb97e3217990f8c47cf9

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