Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20bf5864927c47b…

MALICIOUS

PDF

36.2 KB Created: 2021-07-03 20:10:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b34e1b2aff817136a059f91f943ff40 SHA-1: 1ada5d90a9c07124c2258144502f6f35ef8b51a2 SHA-256: c20bf5864927c47b503685541dc06ea7b33645fce6996a9d44436c22fbcdf03a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The document body and embedded URLs reinforce this, indicating a social engineering attempt to trick users into visiting a malicious site. No scripts were extracted, but the primary attack vector appears to be a malicious link within the document.

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/how-to-get-free-coins-on-flip-master-game-hack In PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/how-to-get-the-game-bloxtube-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-group-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-roblox-bazooka_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/where-to-get-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2pandeglang.sch.id/__statics/gudangsoal/files/today-free-spin-coin-master_GM406889139.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_off000034a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A3 23752 bytes
SHA-256: c29e0f263d45b0325c5a3b03f2b933e4097e81b24d206fe92465939953f0e8b3
font_01_sfnt_off00006a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8D 18412 bytes
SHA-256: a3f222d31def4247f09cb39abe9d6f493a080d6b52ebda4544bb665d808a25f3

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