Malicious PDF — malware analysis report

Static analysis result for SHA-256 bacfc44b30a82a92…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 00:31:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 36402b11ba72832b43efd049584bc322 SHA-1: 1d033f6a4fa20c82727db7547b89725f19ab8f80 SHA-256: bacfc44b30a82a921465c6044da0d7fa06cd00caad560c9552e956b8f11230a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'game hacks' and 'free generators'. The primary lure is a 'Coin Master Hack' leading to the URL https://netcdn.xyz/app/406889139/coin-master-hack-no-survey-or-verification-game-hack. While no scripts were directly extracted, the presence of numerous malicious links and the ML classifier's high confidence indicate a strong likelihood of malware distribution or phishing.

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-hack-no-survey-or-verification-game-hack In PDF document text
    • http://fobh.net/userfiles/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B81 24464 bytes
SHA-256: 854f9c1e4dbce53102fdd731970d1fa7b24dee97856ab9ca76c43c755780dbc6
font_01_sfnt_off000083a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A3 18284 bytes
SHA-256: 11bfbc115034705528bf6e10e44e61aa29d499e253164c4385166f501b43b311

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