Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f57b05c7609f03…

MALICIOUS

PDF

35.9 KB Created: 2021-05-14 20:00:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f86279f409c8651ac6d9c7cce0d55959 SHA-1: 47e73a9b1bc0ee961c98817fda25a0b7861011aa SHA-256: 23f57b05c7609f03730b662a8094a289d111ce43db0f4c659e3b0f315b71d522
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically leading to a 'game hack' lure. The ML classifier also strongly flagged this PDF as malicious. The primary malicious link identified is https://netcdn.xyz/app/479516143/minecraft-cracked-client-game-hack, which is presented as a lure for game cheats. The document body, though partially corrupted, contains references to game hacks and the malicious URL, reinforcing the social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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/479516143/minecraft-cracked-client-game-hack In PDF document text
    • http://farwesterndistrict.org/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://farwesterndistrict.org/images/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/minecraft-items_GM479516143.pdfIn PDF document text
    • http://farwesterndistrict.org/images/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://farwesterndistrict.org/images/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://farwesterndistrict.org/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-firebird-card-free_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_off00004ac6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC6 27724 bytes
SHA-256: 9f5235784cc1b0f32520665f37a7e0f9826562b2c93a1b14d9731db85998418b
font_01_sfnt_off0000888a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888A 3128 bytes
SHA-256: 801f6fa60decd1add2f223f91580103c35e150c924465f86a7a572b3e00674f9

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