Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec192c2aa091987…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 13:52:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1532d2baea87eb8096dffc256116155a SHA-1: 345face014312945dde47f7ff21de3b9998816d3 SHA-256: 3ec192c2aa091987dc00a1df7b8049563df7c415d62748e57eef051892d5ff56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this by advertising free generators and hacks, aiming to trick users into clicking the malicious link. No scripts were extracted, but the primary attack vector appears to be a phishing lure leading to a potentially harmful website.

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/406889139/free-spin-and-coin-links-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-roblox-dragon-ball-rage_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-money-on-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-robux-hack-cheat-engine-62_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-robux-free-codes-android-s9_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/conseguir-robux-gratis-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/800-robux-free-pub_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robuxdill_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-instantly-no-survey_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
stream_002_off00002ef7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF7 23028 bytes
SHA-256: aea83069910b22123cdbe7c21006913258f0ddf68f1a6515140ef142c7f9ac98
font_01_sfnt_off000062ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BA 18412 bytes
SHA-256: feaedb9a78559dc6a64089415154926f3ccc0cd0c5c4fca7e150a72d524e2070

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