Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b3d8eddd72deb2…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 19:38:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fbd5358a6f309bd1f6be4a418414bc44 SHA-1: 6d406bf50f85466985bbdf6e6d760ca82fc654a5 SHA-256: 85b3d8eddd72deb2699cc5d883e6d157c7b3d6ba424f88d945692f8963fa9a21
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and redirects to known malicious infrastructure. The embedded URL http://netcdn.co/app/431946152/roblox-no-cooldown-cheat-engine-weight-lifting-simulator-2-game-hack is associated with malicious redirector activity. The document body and heuristics indicate a social engineering tactic to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-no-cooldown-cheat-engine-weight-lifting-simulator-2-game-hack In PDF document text
    • https://goodtools.tw/upload/files/free-robux-for-playing-games_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/dora-creates-a-free-robux-scam_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-a-roblox-account-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/guess-the-song-cheat-sheet-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-hack-just-username_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/all-roblox-free-items_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/things-that-are-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-without-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-we-get-free-robux_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
font_00_sfnt_off00002ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1 22524 bytes
SHA-256: 6d72d2ad5656dcfd1305a140cc5dcf73edf5c01e86fda74d4c20006460403b36
font_01_sfnt_off0000625a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625A 19936 bytes
SHA-256: 9bbb79cdddaf0e8ada696793d27ee4ff488d1e7b96725ad2aa398226f1d052de

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