Malicious PDF — malware analysis report

Static analysis result for SHA-256 7831046a452b6709…

MALICIOUS

PDF

48.2 KB Created: 2021-06-11 09:01:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0de981446e806c4cd138dd35b0f7a33f SHA-1: 9408fc5a8a27f3a65c0de87dd5143ae8702bb420 SHA-256: 7831046a452b670994c7dfccbb4bee6aef88cf1db81647636864fd904632adc7
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful websites. The presence of a fake CAPTCHA heuristic further supports the deceptive nature of the document, aiming to trick users into performing actions that could lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/how-to-get-free-robux-inspect-stop-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-de-roblox-2021-descargar_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-for-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hacks-for-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-exploit-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-roblox-accounts-2021-april_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005046.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5046 26612 bytes
SHA-256: 80f3f8ab1e2cf1d6eebd6e22ffceacab5c404158d1090ed62107313fc6f81c58
font_01_sfnt_off00008f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F58 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000990a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x990A 18460 bytes
SHA-256: a38c8e85f05e68b1bd0f98444d4b084cd53a4fcc723eff4edb47c0f5b876ad24

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