Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f415b0eec9a68d…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 17:48:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 958f61713399fdfeb953b4cb04a866af SHA-1: 0a9c8a821303aadd3da4e8fca1dabf0ec69f77df SHA-256: 86f415b0eec9a68dd031fc2ec302efb32380fc6da1a20be196aaef46918aeee0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure associated with 'game hacks'. The document body and heuristics indicate a lure for free generators or game hacks, likely to lead users to malicious sites. No scripts were extracted, but the embedded URLs and the nature of the lures suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-hack-dot-xyz-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-tshit-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hacks-for-roblox-gods-of-elements_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/inject-hack-roblox-buides-club_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-kohls-admin-house-hack-script_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-gift-card-roblox-giverway_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-u-get-free-robux-without-builders-club_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-speed-hack-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-lumber-tycoon-2-xbox-one-cheats_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-promocodes-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-change-the-skybox-in-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-with-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hot-to-get-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_002_off00003158.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3158 23388 bytes
SHA-256: b90e9cbced42b78074d6c3caf59f7feb156716e42f70880e8362d13011296cfd
font_01_sfnt_off000065fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FD 18660 bytes
SHA-256: c26c40ee4891c1d47adb0e8ebae699ddddaaac98e823d7b201e7cc814470c871

Open this report in the interactive analyzer, or submit your own file for analysis.