Malicious PDF — malware analysis report

Static analysis result for SHA-256 45577dbfb121e04e…

MALICIOUS

PDF

44.4 KB Created: 2021-05-11 04:05:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bd68f11bd3b4b1aaadb1b540655740b7 SHA-1: dba6424b0ec5e8bcf097ed73e8b43541866f9f70 SHA-256: 45577dbfb121e04e76e4f29591e44a97d5e0355693e9b50f0ea1362af5f70327
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 generators. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure of free game hacks suggest a phishing or social engineering attempt to redirect users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/free-apk-mod-coin-master-game-hack In PDF document text
    • http://pwpyemen.org/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/rbxdemon_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/freerubux_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://pwpyemen.org/images/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://pwpyemen.org/images/free-roblox-card-codes_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-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://pwpyemen.org/images/best-free-minecraft-server-hosting_GM479516143.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_off00004808.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4808 24960 bytes
SHA-256: 7e32ccd2f88a5e6318734edf83ff7cc169c8434282c61be2d357e23031c1ba03
font_01_sfnt_off00008149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8149 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2E 18228 bytes
SHA-256: a426b063dc4d6c9827b6f5e4c4a4688074d1ceec748c2576fe0493b7e0292ced

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