Malicious PDF — malware analysis report

Static analysis result for SHA-256 1867c82b933930eb…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 03:41:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bddc88166a9234be608b0592b4e6acf1 SHA-1: 14cfb9d503959473ea1cb9e4bcc279d9825ae7d5 SHA-256: 1867c82b933930eb1d37450e5a9fb0cb84d4e7b148722a7a96e51b142f85dbf0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free items, specifically mentioning Roblox and Coin Master. It embeds a URL that is flagged as a malicious redirector, which likely leads to further malicious content or downloads. The presence of embedded URLs and the nature of the lures strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites.

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/how-to-get-a-free-dominus-in-roblox-mobile-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokeballs-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokemon-go-free-offers_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-create-a-shorts-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roam-roblox-survival_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/paytm-to-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-download-a-swearfree-roblox-speech-pluggin_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-and-coins-daily-links_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
font_00_sfnt_off000030d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D4 21924 bytes
SHA-256: 5003bbe3c9cf6f574144a4122e36e26306a0e38ec3ae950f64168d221816ace0
font_01_sfnt_off0000616c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616C 19800 bytes
SHA-256: c1da19a687a4c96fedc7614777be30551c36fe291e4b2d72a4cb1970c7ab4d2d

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