Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69b5cc26214dc1f…

MALICIOUS

PDF

43.2 KB Created: 2021-05-14 13:36:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 08c9b4cbd64cf4b2873908d826843ca6 SHA-1: ef39a80cd4df9b5d2676c8bbc804ef58db507de3 SHA-256: a69b5cc26214dc1ffeb8e455bff6b7d3d2dff0fe799d95346deb6260e520da54
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and generators, with one URL identified as a malicious redirector. The document body, though partially corrupted, also contains references to these lures and embedded URLs. This suggests a phishing or social engineering attack aimed at tricking users into visiting malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://netcdn.xyz/app/431946152/roblox-piano-hack-game-hack In PDF document text
    • https://allhimalayantreks.com/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-and-coins-link-haktuts_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
stream_003_off00004a6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6F 26240 bytes
SHA-256: 91a58dfc519b9b86b667d9ad957a53bd50d8e7f9da291c5ef9021b8a95fde8bc
font_01_sfnt_off000085f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F2 18456 bytes
SHA-256: b3a5bdafa913fbeb08409da0979c792cb3491f79dd739ad0ffcb7a8a40d00987

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