Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc7faf19729c5bb…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 14:37:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5b189edad3712ae77da92da401b28877 SHA-1: 866e6c0e2ed243e7f154eb58508cb120fbfebeab SHA-256: afc7faf19729c5bb41a341a84547865e5b2ef3eb1081744923ae90c7e906fee4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a malicious redirector, disguised as game hacks and free item generators. The primary lure URL is http://netcdn.tw/app/406889139/daily-free-spins-coin-master-2021-game-hack, which is flagged as malicious. The document body and embedded URLs indicate a social engineering tactic to trick users into visiting potentially harmful 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.tw/app/406889139/daily-free-spins-coin-master-2021-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/roblox-got-talent-piano-hack-download_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/888-robux-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-inspect-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/trigon-roblox-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-royale-high-school-hacks-de-todo_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/rise-of-nations-hack-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/hacks-for-work-at-a-pizza-place-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/wurst-112_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-mad-paintball-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/woman-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-bots-allowed_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roaming-camera-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-minecraft-wallpaper_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F7 22376 bytes
SHA-256: fc434a4168688b2fd0bc5050071b57b787192582e3e0bd587be76356224e20b3
font_01_sfnt_off000064d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D1 19000 bytes
SHA-256: 933a9abb3ea4f8fbe1c77bcd3d2591622a827aeefe2bea77f70e7028cf79008c

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