Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5d87faacffee25…

MALICIOUS

PDF

44.8 KB Created: 2021-05-02 10:56:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 40331257e0eaa3bc205e2b10a4089c56 SHA-1: 3ddf1a5568ac3d212523b25c4cb704210735bfe3 SHA-256: 1e5d87faacffee2561ff8562de7e3bd6a7006977a6313206d4d8adcd988e5925
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game-related items to entice users. It contains multiple embedded URLs that point to known malicious redirectors and potentially malicious content hosting sites. The document body explicitly mentions 'Roblox Generator' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the social engineering aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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 https://netcdn.xyz/app/431946152/free-clothes-that-are-good-on-roblox-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-no-virus.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/5-games-that-give-u-free-robux.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-on-roblox-2021-june.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/completely-black-pants-roblox-free.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/phantom-forces-hack-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/now-speed-hack-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-headphones-roblox-catalog.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/google-how-do-you-get-free-robux-on-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-para-roblox-final-stand.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/invincibility-hack-roblox.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_003_off000044be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44BE 26988 bytes
SHA-256: 57bff092e1bcec6525af31c980a3b6c8056ba5377c73f5008126ab2927915fce
font_01_sfnt_off00008264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8264 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C15 18620 bytes
SHA-256: b672b7b5aed21f7959b91e3b6cbdb67d8b3897c234d7c1e418eff91156019ee7