Malicious PDF — malware analysis report

Static analysis result for SHA-256 7afd192337f19ae3…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 19:11:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0deac896324c59b9bcb61669560b6b9e SHA-1: 0c9f4e89d82c7f5ab662a90ad3061f4e7300e7d6 SHA-256: 7afd192337f19ae326540f2ce1ab2155372e720c590a545b2ae6ebdb1f615a6e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites offering game hacks and free currency, with a primary link identified as a malicious redirector. The document body and heuristics indicate a lure for users interested in free in-game items or cheats, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.co/app/431946152/why-is-robux-not-free-game-hack In PDF document text
    • https://www.similar.com.tw/upload/files/free-roblox-accountrs_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/como-hackear-todo-os-vehiculos-en-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/roblox-hack-cheat-engine-money_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/roblox-10-dollar-gift-card-free_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/hacker-roblox-accound_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/robux-free-infini_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-card-codes_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_off00002d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1D 22596 bytes
SHA-256: 6f627109ee43a5ba5845c2090944f31fb2f3b1e13829a5a3cd69f29659ee4bde
font_01_sfnt_off00005fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB5 19364 bytes
SHA-256: 0c19ffec978d4c551cebf301280500c91ded7f6cc6e767c27e6ffb0b8b4a8ff6