Malicious PDF — malware analysis report

Static analysis result for SHA-256 6402e0e8524c6d08…

MALICIOUS

PDF

53.3 KB Created: 2021-06-07 15:20:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4885928e77370a23a25221e1bf1ab0c5 SHA-1: a517b4f952b0fd7f68a0b7f32e589c7dae71bcd4 SHA-256: 6402e0e8524c6d087e2fd442495176f22edf760b5d19d085ff6265343464a1f8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains multiple links to a redirector URL, impersonating Microsoft to lure users with a 'free generator / game hack' for Roblox. This is a common tactic for credential phishing or distributing further malware. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/isuku-roblox-free-shop-t-schirt-game-hack.
  • 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/isuku-roblox-free-shop-t-schirt-game-hack In PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-how-to-use-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/arsenal-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-promo-codes-roblox-2021-robux_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-robux-quis_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-gems-roblox_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-hack-a-roblox-account-2021-easy_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-get-tbc-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/t-shirt-roblox-adidas-girl-free_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/ge5t-free-robux-doing-quizzies_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/anti-ban-and-kick-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-hack-plates-of-fate-roblox_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/comment-cheater-sur-roblox-relail-ticoon_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-to-play-games-for-free_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/pison-club-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/how-to-hack-in-to-builder-mans-acount-roblox_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-robux-hack-tool_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/robux-hack-pc_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-hack-discord_GM431946152.pdfIn PDF document text
    • http://aks-akk.ac.id/html/perpusakk/repository/roblox-system32-host-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005482.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5482 26432 bytes
SHA-256: a381813e67a46338daf8bed27493628cd5279d4ac8329c79802ec146ebe92737
font_01_sfnt_off000090c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C6 8468 bytes
SHA-256: 9fbfd049cea6a11b2474541e6cad010d631ff6f5284ed0a7ab33cf70ba2fd9bd
font_02_sfnt_off0000acbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACBF 18824 bytes
SHA-256: 959d86b0b1834c71fad065da6da6e00eafa718f7c465b14cce37225cd95a6766

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