Malicious PDF — malware analysis report

Static analysis result for SHA-256 695af49ce7165baf…

MALICIOUS

PDF

49.1 KB Created: 2021-06-04 00:25:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7b0ff22ab9e0bf5a2b06025379a35d69 SHA-1: de5e615cef611c78784d2482ff2f49fa2fd813a2 SHA-256: 695af49ce7165baf9e3cd830843d34c86253f5ff5a3ddd0b089e96f31ffcd4ea
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links designed to lure users into downloading game-related cheats or resources, with one primary link pointing to a known malicious redirector. The document body and heuristics indicate a deceptive lure, likely intended to lead users to potentially malicious websites or further downloads. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/haktuts-2021-coin-master-free-spin-link-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-apk-download-v1-144-2-free_GM479516143.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_off0000534b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x534B 29540 bytes
SHA-256: 756a8c61aa5fece5653dd8e1c5d4cb335517d757909f49b8fc9597cca63383ed
font_01_sfnt_off0000916a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916A 3204 bytes
SHA-256: b7fe42cb1da39e96c756399b3532633df029c1fbb3443b9e17d98df25c90dc65
font_02_sfnt_off00009c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6E 18600 bytes
SHA-256: 0377bed8f11e9d33b4e58dd3bbc318f67a9398bad3c38ecff466878595338458

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