Malicious PDF — malware analysis report

Static analysis result for SHA-256 995a35de076fa53a…

MALICIOUS

PDF

37.1 KB Created: 2021-05-22 15:45:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ffd661cf4c4f024ee4e2219ae73055d2 SHA-1: 2e6ebc753b38dfb5dc8dcd0af2735f0430db49df SHA-256: 995a35de076fa53aa63534d5be126518ffa47dfaadeb2b9e6eb14477a9dcbb67
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of free game currency and hacks. These links point to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The document body and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-coin-master-spins-game-hack In PDF document text
    • http://micromegamondo.com/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://micromegamondo.com/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://micromegamondo.com/images/robux-win_GM431946152.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_002_off00003622.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3622 25692 bytes
SHA-256: a2f9e5a4f1c7002a1647fdfa2a4c68b9b6fb7f8a90575dd949b7e731873cfa69
font_01_sfnt_off000070f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F7 17884 bytes
SHA-256: dbba0adc3b1b7bb8b2e5e51fec5d28ab169e2f7a165ed2a14d616932af559aea

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