Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f3dfcaaecf8630…

MALICIOUS

PDF

49.8 KB Created: 2021-06-11 07:07:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c8c633c8f5ac8ae7419124920891ed74 SHA-1: 0940f3c822b711cabefe023b963957a6f7fe0aef SHA-256: 79f3dfcaaecf86305b7cd02a502a56491b875ed7cd379bef9ccbe0b9927acbea
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free generators, impersonating Facebook to trick users into clicking a link. The link redirects to a known malicious domain, indicating a credential phishing or malware distribution attempt. The document's structure and embedded URLs suggest it is designed to exploit user interest in in-game advantages to compromise their accounts or systems.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/roblox-hack-cheat-engine-2021-game-hack.
  • 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.tw/app/431946152/roblox-hack-cheat-engine-2021-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pubg-uc-cheap-price_GM1330123889.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/pokemon-go-free-98_GM1094591345.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-escape-room-free-access-code_GM431946152.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_off000051da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DA 28300 bytes
SHA-256: 571d1791735efa0fb4434e38918a5f2825a0cbb39afcebdef7a0165842503140
font_01_sfnt_off0000935f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D11 19260 bytes
SHA-256: 084e995eb492634b691d1bc8a481706432fc7d76dd169cadc5235ee91fca8ef0

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