Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab8c2acfe0851ff…

MALICIOUS

PDF

50.5 KB Created: 2021-05-11 15:34:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7bdbd71c49092789d27c330b355248f9 SHA-1: 315f81f19e70b525f3618b23ac5c472a517df073 SHA-256: 7ab8c2acfe0851ff34a5b731cc820710de1c0efb9f026f8a0076b518c3aa04ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free currency, identified as a lure for malicious redirection. The primary malicious URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-link-blogspot-2021-game-hack, is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a workflow designed to lead the user to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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-free-spins-link-blogspot-2021-game-hack In PDF document text
    • http://vcelarskepotreby.org/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://vcelarskepotreby.org/images/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004af9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF9 24388 bytes
SHA-256: 4d490b4155e23e5fcc0ad900fb8491223380ea171941163b0a4dd09f05cb8f3c
font_01_sfnt_off00008222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCE 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000a059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA059 19036 bytes
SHA-256: a1db0e26d638f2546736f1f7b434dee98a1c5e726f40723477b7c203db66759e

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