Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a8c464ddc663a8…

MALICIOUS

PDF

47.2 KB Created: 2021-06-04 03:52:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5ae63fa4d6ec2ff170f24dce18fdccfa SHA-1: da2d6cb67bda3581d7fcb8fc06d26fa6b8f184c2 SHA-256: 10a8c464ddc663a8d35d08d75c9ac2f4b443600671b3ea46aacac1dc6b0ca13c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.online/app/406889139/how-to-coin-master-hack-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-download_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/when-tiktok-free-will_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pubg-uc-in-cheap-price_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F86 26916 bytes
SHA-256: fea4501c5c10fa45f83c3c104ad43d1f7ef18537803f26233b4060b269f61042
font_01_sfnt_off00008cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC1 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000096ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AC 17880 bytes
SHA-256: b097c0e0a508b19b294d84254edc3a7906d96ed82e768bd7a04e405a1f825274

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