Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8f24f5a8793d8d…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 19:21:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1f1c4f056116efe2215ca75368b61ee2 SHA-1: 07925ac7678e724467bd046303bab47c3c004182 SHA-256: 2a8f24f5a8793d8dce7710253ca2963ab369f3d1a46c0c9c039ebed1a8f009dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/wahoo-gaming-co-free-robux-game-hack. This redirector is likely used to funnel victims to further malicious sites or download further payloads. The document body and embedded URLs suggest a lure related to game hacks and virtual currency, a common social engineering tactic.

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/wahoo-gaming-co-free-robux-game-hack In PDF document text
    • https://tena-g.hr/files/hack-money-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/www-robux-cheat-us_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/are-there-fe-free-games-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-free-coins-on-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/como-descargar-hacks-para-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/cheat-intuable-roblox-mad-city_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-free-spins-app_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_off00002ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE1 22172 bytes
SHA-256: 94ca35fff3073c3a685807595725717158f60ea2a7d2b5bd84d5af0fddd3c795
font_01_sfnt_off0000601f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601F 19460 bytes
SHA-256: 25181eaa6be0d5b476285318664890f4926978dca9587ea82b488640a0a05646

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