Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec0559bc1d927e4…

MALICIOUS

PDF

39.3 KB Created: 2021-05-10 16:01:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2a0b5e010a7baedda54cce7b2638070e SHA-1: 8d94fb08e08d7d7537ef6df99c6cd79920534d1f SHA-256: cec0559bc1d927e49df6d6f5e4adec7210b90e1bf6b8c431fd6c620206e7e8b9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically targeting users with lures for game hacks and free in-game currency. The document body and extracted URLs confirm the intent to direct users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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-extension-game-hack In PDF document text
    • https://itv-grabungen.de/images/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-com_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-on-chromebook_GM431946152.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/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hacks-no-surveys_GM406889139.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_off00004015.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4015 25048 bytes
SHA-256: 0d25a95d21a680bbd73a5b81bacb07ec69fe38e363096c632e9ec003cf1a708b
font_01_sfnt_off000078b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 17924 bytes
SHA-256: 4ec806a11ea658252867691d695683eda87cb09c7a2cbc5226fdb095b6c4840a

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