Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9e55fe68aae912…

MALICIOUS

PDF

42.0 KB Created: 2021-05-18 23:53:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1cfae41aca3833642ac17878ad569695 SHA-1: 25ce11c2ac0608ee92a62321d2ff497b53958863 SHA-256: 6b9e55fe68aae9126b06059bc4296f0d67a728179fa21de8f40df56de53812cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The primary malicious URL identified is https://netcdn.xyz/app/1330123889/pubg-uc-malaysia-murah-game-hack. The presence of multiple embedded URLs and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful sites.

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/1330123889/pubg-uc-malaysia-murah-game-hack In PDF document text
    • http://zarinnameh.ir/images/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/robux-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/robux-link_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-free-robux_GM431946152.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_off000046cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46CF 25392 bytes
SHA-256: 4a5400a24fc8757e324f160785baaa573e2563921eb23541dfdff68112212cd0
font_01_sfnt_off0000805a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805A 18864 bytes
SHA-256: f8b010946ea455faf52f43ef738d2162bd64e4c435700dcafe875013fee7daac

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