Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67d0f127cbf233e…

MALICIOUS

PDF

33.1 KB Created: 2021-07-19 22:23:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9b5b529116e5f7524818149bd283bfa0 SHA-1: 26de643300c673c5083f86c6652bb67f8e3dbf03 SHA-256: b67d0f127cbf233e628364d99090597d9491be3c9f6b4ab78ced13679ecaf69e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to suspicious domains, identified as malicious redirectors. The document body and heuristics suggest a lure related to 'free game hacks' or generators, a common tactic for distributing malware or conducting phishing. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious workflow designed to trick users into navigating to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/479516143/can-you-play-minecraft-for-free-game-hack In PDF document text
    • http://famoirs.co.uk/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://famoirs.co.uk/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://famoirs.co.uk/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://famoirs.co.uk/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://famoirs.co.uk/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.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
font_00_sfnt_off00002ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA6 22628 bytes
SHA-256: 922f9b82899449bf002a112fcba3efbfe3ecb59b94974e3f0cd972798553dc73
font_01_sfnt_off00005f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F25 18420 bytes
SHA-256: 81bede04d90c080fa29d20db124f1531358f39ee91ce610139dedd08dc3401fc

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