Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2d6ace1752e506…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 23:33:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1508763812278a7659af538af9448f53 SHA-1: e771c5157ec8e8a7072b2d9a9583555de48a7451 SHA-256: cf2d6ace1752e50640276cd5d7dee7a44fb2aba55476cb2d746e8545c2648c19
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely leading to a further stage of compromise such as credential harvesting or malware download.

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/479516143/minecraft-server-hacks-game-hack In PDF document text
    • http://sbm-nn.ru/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/wurst-112_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-mobile_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B1 28528 bytes
SHA-256: 8bc13011dcd5c082af4a89765007079bbebaed72b623f009135c7923d34d76b8
font_01_sfnt_off000088e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E9 17852 bytes
SHA-256: d08e9f99218473ecffc4f3e4fddc043c571e48cf04331ee5ff23a4dc6866f563

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