Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2dc0a5f67671c85…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 03:59:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e2bc906dff0badd95fa0a3888a8c7925 SHA-1: a56f3cab3a6f87642eb1bb186a5a6ffbe0c64162 SHA-256: c2dc0a5f67671c85be588637236c5602c5cb7f51bc00d7ea90d4aed54fb4c86b
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, masquerading as game hack generators. The primary lure is a link to 'coin-master-hack-2021-game-hack', which is hosted on infrastructure associated with malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/406889139/coin-master-hack-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/near-pubg-uc-code_GM1330123889.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pubg-uc-number_GM1330123889.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-fly-hack-in-roblox-tower-of-hell_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hax-download-no-virus_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_off0000512a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512A 25036 bytes
SHA-256: 444fcc04e7fea37d3dd211fdb5bbf2348deb3712820d2ff4c7202b00a187717d
font_01_sfnt_off00008a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1C 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00009520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9520 18116 bytes
SHA-256: 17974cef81917e5ef69542194afa433aff210173cc902887fbc2b56a9328dd03

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