Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbfc9ab90d0444e…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 01:01:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a6c0bb48bda59b989fced947a27ba06a SHA-1: 54e3abf37468a1c73dbbb66b51630fb7d43ab654 SHA-256: 1fbfc9ab90d0444ef4d7bcab65c28ed1938e677943f472af0ab021a8bc301f2d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are identified as malicious redirectors, specifically targeting users with lures related to game hacks and generators. The document body and embedded URLs reinforce this lure by mentioning 'Coin Master Link Spin' and various game-related hacks. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a redirection-based social engineering attack.

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/coin-master-link-spin-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-roblox-accounts-2021-may_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-glitches-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-elemental-wars-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-in-roblox-players-acc-com_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-accoiunt_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/secret-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cool-free-roblox-characters-uu_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-mad-city-money-cheat-codes_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-codes-ipad_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hilton-hotel-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/comment-tre-un-hacker-sur-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-jailbreak-hack-download-easy_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-minifigure-codes-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/fre-robux-fro-reallllllll_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/why-cant-i-use-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/is-there-an-anti-cheat-on-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
stream_002_off000030fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30FB 23168 bytes
SHA-256: b4d2b6896de4671ccbc42191d927d5d260f8e7ba6f233fc86a328b26d520c5c5
font_01_sfnt_off0000650d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650D 18180 bytes
SHA-256: accd6e67d97fb62f461d44488d0438595f4e2a81ab0ce48d14b069d0d100ad1e

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