Malicious PDF — malware analysis report

Static analysis result for SHA-256 310b4b87c4beec77…

MALICIOUS

PDF

47.9 KB Created: 2021-05-20 00:07:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e20707fb510a1ee96ad8a1c6768810bc SHA-1: 38f9cf7e5abebdc4098edaa315eee6d65ae10788 SHA-256: 310b4b87c4beec77410e3ffc07a597354b278b16e094d57d877b812d523825ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free generators. The primary lure appears to be related to obtaining Robux for Roblox. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attack designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/how-do-i-get-robux-game-hack In PDF document text
    • http://pwpyemen.org/images/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/pubg-uc-daraz_GM1330123889.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/hack-download_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-roblox-exploits_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
font_00_sfnt_off000049bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49BB 31144 bytes
SHA-256: a83a9be07b7dd84825322b15f96de0c7784660a6fee9e8797f466857dcd55f1f
font_01_sfnt_off00008ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC8 2872 bytes
SHA-256: 3677f1089b04bc9f8fdb7e35dd97af639e96a7de4efcaa34604b2375e2f06fba
font_02_sfnt_off000098ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98AC 18284 bytes
SHA-256: 76696481b4f85a4b134e50273d4f72d60bf885136cdb061a204ba21e520483fb