Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4137805049cbb7…

MALICIOUS

PDF

40.6 KB Created: 2021-04-28 19:37:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 51d2e0a67a00ef6f813d7f4c9c196ce7 SHA-1: 87208efba7e3f8461845d6df444b583fe88ea1c3 SHA-256: 5c4137805049cbb7cf79718f333d1239c736f024442d6c966dc54cd93a3822dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one prominently leading to a malicious redirector disguised as a game hack generator. The document body, though partially corrupted, contains text related to 'Hack Roblox Vehicle Simulator 2021' and a call to action to access a generator. This indicates a social engineering lure to trick users into visiting malicious sites, likely for malware distribution or further phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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/hack-roblox-vehicle-simulator-2021-game-hack In PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-admin-hack-2021-november.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-sword-fight-on-the-heights-original-how-to-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-hack-arsenal-roblox.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/op-free-robux.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-robux-generator-unblocked.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/imperium-roblox-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/cb-ro-roblox-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-bird-simulator-hack-script.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
stream_003_off00003d28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3D28 26728 bytes
SHA-256: 9ae111fddf99feefb5dfde7d30634eaeae2ea269c42107105439d3d55994f05c
font_01_sfnt_off00007975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7975 19508 bytes
SHA-256: 3f44ded0488b2456dd3aa986e18707ee751ba09e6550726900cadb03042140ac