Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c105ae5b522f1d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 22:23:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6d59140b3de3478fa54094c6c5a3a63d SHA-1: f5921e0428d2d43bd86c9abb6e306e1d34443de4 SHA-256: f0c105ae5b522f1de800ca7f4f8ae4777af85bce4f8e76467bf710372247e9bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically advertising game hacks and free currency. The document body and heuristics indicate a lure for users to click these links, likely to download further malware or be redirected to phishing sites. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a malicious intent to exploit user interest in free in-game items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/free-spins-on-coin-master-without-human-verification-game-hack In PDF document text
    • http://librarystkippgribl.com/repository/boku-no-roblox-hack-quirk-vermillion_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/pokemon-go-free-coins-no-human-verification_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-free-modeler_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/do-free-robux-scams-work_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/orewards-com-free-robux_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
font_00_sfnt_off00003237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3237 22160 bytes
SHA-256: 2351b428efc7214f0e3f821b7d62cc10c8fd9aa99df09c58c0f4c06e3c538a1a
font_01_sfnt_off0000634a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634A 19072 bytes
SHA-256: 27ae5e168144f9143b4eb17c336d82063430b57a560ff005ec1c031da73db6d2

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