Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c36706adb9fd75…

MALICIOUS

PDF

44.7 KB Created: 2021-05-17 00:41:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7132bda726943a1fe8868ec8db82db1c SHA-1: 431a0907efd000a89f9b581950443a8f9ea993d0 SHA-256: 66c36706adb9fd75b706eba2f43772358ff9165e376f38d86b6bb818817e7ab1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirector infrastructure, specifically targeting users with lures for game hacks and cheats. The ML classifier also flagged this PDF as malicious. The primary IOC is the initial redirector URL, which likely serves as a gateway to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-xyz-game-hack In PDF document text
    • https://itv-grabungen.de/images/cm-daily-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-reward-link_GM406889139.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_off000049c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C6 24644 bytes
SHA-256: ee87a7eef9bfdc9727993d311ae4aa6828422f2d8f35080783d44d26e870470c
font_01_sfnt_off0000825d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825D 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C48 18204 bytes
SHA-256: eb378c11d4c3edf43fd4a317fe896922564aeaa66921672c4d59ab66e1a3bbf9

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