Malicious PDF — malware analysis report

Static analysis result for SHA-256 becb1ce04b84708e…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 12:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fa377b04bde9f34dbf81de9b51369dce SHA-1: a5b8fb7d96bc8e3933d4c04a40d0e9be69978b45 SHA-256: becb1ce04b84708ea47ddcc65b4ab3b2cde93f20ca4a0f47ee83e975193d0e3b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple heuristics indicating it is a malicious redirector, specifically designed to lure users with promises of free game currency or hacks. The embedded URL directs to a known malicious redirector infrastructure. The document body and embedded URLs reinforce the lure of free game-related items, suggesting a phishing or scam attempt.

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.tw/app/431946152/claim-gg-free-robux-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-robux-card_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-steves-one-piece-hack-tp-chest_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/pokemon-go-free-egg-incubator_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/good-roblox-hack-exacuter_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
font_00_sfnt_off00002e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2D 21692 bytes
SHA-256: 981fb1ca64da1b381ff70fa7f3391f4f13f39c1efb3c92e385d27740c73a13bc
font_01_sfnt_off00005dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC1 19168 bytes
SHA-256: 2362c95d5f9c36a69ccc9bb0a02a2e14dff77a2a21d49e742691bac5a89e0773

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