Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff69f00977e8720b…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 17:10:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d3fa12c90bc5e8a5fd1bf3117ec4af05 SHA-1: f012bce241eb6b956cc93ebdb82f312babae5c2a SHA-256: ff69f00977e8720b55a29459a24fa83993857a873875f7af68827a372fdaa0e1
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, that promise free game currency and hacks. The document body and embedded links suggest a lure for users interested in obtaining in-game advantages. The presence of numerous PDF links further indicates a link farm designed to attract traffic and potentially distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-free-spins-and-coins-today-game-hack In PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-tiktok-hacks_GM479516143.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_off00004b0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B0A 25364 bytes
SHA-256: 56aa750c964ff87b38ef11372d673df249068ef9cbd0211194ac270452912b77
font_01_sfnt_off000085aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AA 18240 bytes
SHA-256: 3719491a9c8fefeea03f68de14e56d93a4ff097dba5adf71ae2e44f224446be6

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