Malicious PDF — malware analysis report

Static analysis result for SHA-256 a800cfb92a80d6cb…

MALICIOUS

PDF

48.2 KB Created: 2021-05-10 23:05:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8fa5d522b0d002c27d2232d57d1247d8 SHA-1: cf20d6850a868e9af43dba2ca20dd3dd918ed528 SHA-256: a800cfb92a80d6cb4b571e75cf840cff0c182c5140a09e4e5569e728eb3124c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple embedded links that point to known malicious redirector infrastructure, specifically targeting users with lures related to 'game hacks' and 'free generators'. The presence of a visual download button further encourages user interaction with these malicious links. The document's primary function appears to be directing users to potentially harmful content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/free-printable-roblox-images-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-apk-android-free_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_off00004cb0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB0 25756 bytes
SHA-256: 64f824d05384f6cf185213aa369a2de8154a1f6f337061384ffccb49d3d06b21
font_01_sfnt_off0000890e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890E 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_02_sfnt_off00009799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9799 19100 bytes
SHA-256: 52df27bb4923834f8c6fcae4232bb166f01d001b7d976c48697583e0b382e25f

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