Malicious PDF — malware analysis report

Static analysis result for SHA-256 16bd9ee8fb9aa068…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 19:22:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e1677d703571d24c64df1e8fd6707ece SHA-1: 8d7c5564598d8c17a086d15ffdbfc52f427c8047 SHA-256: 16bd9ee8fb9aa068fdb58c1ed0724d11933a12b25a104c2e832d2d27c6412fb7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/free-modded-minecraft-server-game-hack. The document body and heuristics indicate a lure for game hacks and generators, likely to download further malicious content. No scripts were extracted, but the embedded URLs and redirector activity strongly suggest a phishing or malware distribution attempt.

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/479516143/free-modded-minecraft-server-game-hack In PDF document text
    • http://www.emotional-training.com/storage/editor/files/roblox-dll-hack-injector_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/cheat-roblox-mad-paintball-2_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/how-to-get-builders-club-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/robux-scam_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/roblox-hotel-empire-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/roblox-points_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/a-vide-on-how-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/pokemon-go-free-balls_GM1094591345.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/roblox-bee-swarm-simulator-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.emotional-training.com/storage/editor/files/free-axe-roblox_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_off0000315d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315D 21532 bytes
SHA-256: b19728cb68152fb30c3553a40c82da0f4389bd26678cb16b7426487967db47ff
font_01_sfnt_off0000605c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 18284 bytes
SHA-256: c44f5995e1a698afb30ee04b8d335bc8d1a723b5683d31903f3ca0c4c9b26917

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