Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e869789b2b20b62…

MALICIOUS

PDF

43.5 KB Created: 2021-05-14 02:30:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4c96c5a062494abec82218e8dbdb759f SHA-1: a1c5f579ebd15c570f1986d3903a35d7cb6a9d51 SHA-256: 5e869789b2b20b622fc36e393d2458d913b6e6b280ebcd87770e652336070a98
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this document as malicious. The primary attack pattern involves social engineering through deceptive links, likely intended to lead users to phishing sites or download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-roblox-groups-with-funds-game-hack In PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-support_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://www.africanearthgroup.com/uploads/files/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://africanearthgroup.com/uploads/files/files/how-to-get-free-coins-in-coin-master-game_GM406889139.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_off00004af8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF8 25492 bytes
SHA-256: ee3d3e56136c22ca2e9a62e0bebd3a15e534ebc64ca8715e8eb17755e178dab7
font_01_sfnt_off0000857c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857C 19028 bytes
SHA-256: 3400496694c4b95422a50533d9ab07e9ced2fd8b85931bd61225c3b69c3e3d7c

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