Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef3db2046477c20…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 11:34:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6d81bf99211e7d369d958486df4867a9 SHA-1: 4c2b65ad9f9696f3997226b73bbcfc7b1402ac34 SHA-256: 5ef3db2046477c202bf26879dd5178157cc8cc60bc5e7d5f04f56c1987921855
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free spins to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts other malicious PDF files. The document's content and embedded URLs strongly suggest a phishing or scam campaign aimed at users seeking in-game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-hack-spin-ios-game-hack In PDF document text
    • http://christiansymbolkits.com/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/best-way-to-get-free-robux_GM431946152.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_off00004c2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C2C 24320 bytes
SHA-256: a2552237ea99064b61c5a4fda6135f5fd7e786e90994645e743caeb65d66c660
font_01_sfnt_off00008402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8402 17892 bytes
SHA-256: 8a2199a6fb9e6551992738fdb7d2625a8f143b5a9fef4499610b6e02eb0e5450

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