Malicious PDF — malware analysis report

Static analysis result for SHA-256 df63b0d6ae417754…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 09:57:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7848076043713b1ec203b831f9da251e SHA-1: c8d1c3c32d4e79af9dd6aebbca32a685ef6f73c6 SHA-256: df63b0d6ae417754729ac06c3c9921104b085cd0c6c4f842be77561503531dc0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts numerous other PDFs with similar lures. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

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.co/app/431946152/october-2021-roblox-hacks-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-for-android-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-death-sound-effect-free-download_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/actual-working-robux-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-well_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/cookies-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-variable-modifier-script-cheat_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/sentinel-exploit-roblox-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E48 23028 bytes
SHA-256: 018e68f151637bdc63cdf5bc8464617982b21ca4f50d7429a95275f602c426be
font_01_sfnt_off0000618a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618A 19164 bytes
SHA-256: 3627db0d5fdaa7b421c351d1ff9b3d316150f682540262c0a44720ca612402cf

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