Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d91bbf44fbaf373…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 06:14:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8a0b5d50d40080d522db9378579f808b SHA-1: 730c94513ff6fcf250bc22810b5199d54c8580d4 SHA-256: 5d91bbf44fbaf373081556383b0c878c9f51fb2ea55676119689a4f32d53e3f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector lure, specifically linking to a 'coin master hacks' generator. The document body also contains the same URL, reinforcing the lure. This suggests the primary purpose is to trick users into visiting a malicious site, likely to download further malware or engage in scams.

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-hacks-for-pet-food-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/https-growbux-net-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-players-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/google-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/test-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-viexploid-madcity-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-guest-arms-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-game-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-robux-simulator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-golden-card-in-coin-master_GM406889139.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_off00002e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E61 22876 bytes
SHA-256: 179fd567250d760334989a8446fa960ec21cbb6106ba5fb1ca0b66a9c1fe85bb
font_01_sfnt_off000061d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 18496 bytes
SHA-256: 3482fc400d81b1a7f90fd236f06bcdb2bc7de576b1c57b31c5bf1eb875374c25

Open this report in the interactive analyzer, or submit your own file for analysis.