Malicious PDF — malware analysis report

Static analysis result for SHA-256 5346d357d5fa125c…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 13:08:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4069f0cfb9b07a09d7b1fc22f795a720 SHA-1: d0b35d0ec94045713bcb557d1fc918184c6c5ea1 SHA-256: 5346d357d5fa125c25279da4f5ec205331083d300411235fd80fddcac9c1c720
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are part of a link farm designed to lure users with promises of game hacks and free in-game currency. One prominent URL, https://netcdn.xyz/app/406889139/coin-master-hack-ios-app-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-ios-app-game-hack In PDF document text
    • http://aviaprofsoyuz.info/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004817.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4817 24240 bytes
SHA-256: 8fca7c72d78029c644eee3323921874f4f8bd7e42bc03d2ba51035e2a1c71866
font_01_sfnt_off00007f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6E 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8959 17892 bytes
SHA-256: c18f05485291fd9dd2d982fa815b69c2a1f9afc9df9b250f8ccfc4cbb8514acf

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