Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1345b96ed96d50…

MALICIOUS

PDF

35.3 KB Created: 2021-07-20 05:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 18d2547b207c26443bb5da042a5f362b SHA-1: 2108d554607df2bdda18b3fd91656c598d165322 SHA-256: 0d1345b96ed96d5022d3b249ca44f14e6f12e214401b31e66a3cac376f1acc30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users with lures for game hacks and free generators. The document body and embedded URLs reinforce this by pointing to similar scam-like content. The primary malicious link is http://netcdn.tw/app/406889139/free-coin-master-spins-game-hack, which likely serves as a gateway to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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-coin-master-spins-game-hack In PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-views-tiktok_GM835599320.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/minecraft-build-hacks_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_off000034ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34EE 23240 bytes
SHA-256: c53c9876452bfe988ffdbe47bd9ecf48003bc50a5a88e3a74c6e16c649ab7a38
font_01_sfnt_off00006954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 17884 bytes
SHA-256: dbba0adc3b1b7bb8b2e5e51fec5d28ab169e2f7a165ed2a14d616932af559aea

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