Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bcf55cd4684d164…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 18:12:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8231c1e2dd1db27055701b94ad57c7ca SHA-1: 2a4749040e76323b8e9c22463c8dd65add40a496 SHA-256: 0bcf55cd4684d1648802b92f5b5391cc44cd8cd0ace76b6acf56b2bb001fa0f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious site offering 'game hacks'. The document body and heuristics indicate a lure for free game currency, specifically mentioning Coin Master. The ML classifier strongly flagged this PDF as malicious, and it links to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-coins-link-facebook-game-hack In PDF document text
    • http://technologicalsc.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/game-toolbox_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-spins-hack-ios_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_off00004a19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A19 25460 bytes
SHA-256: 3f325798af54d53dca562c37824d29f15f5b1de45cbcd0a47fa211fe86de9f4f
font_01_sfnt_off0000852a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852A 18040 bytes
SHA-256: 63f6a73c8fcac7a0296ba30c45c7d116406f1db46acc5b5307ffbf1c764f0ccd

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