Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9d20982dba1be2…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 17:58:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5db0ed7fce0921a51dc0fad2ec62b0ba SHA-1: a992e22e276709ad7fd1af1771df60873f777d1b SHA-256: 8f9d20982dba1be264989135e85fd13f83549abd7100c1b31ace03f04bc679f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free currency to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/mcpe-master-coins-hack-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-hack-august-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/je-cheat-dans-roblox-4-000-000-millions-de-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hoto-get-free-robux-works-100-no-human-no-survey_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/cheat-roblox-fly_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-real-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3262 22236 bytes
SHA-256: 128ee664655735b24f8d2e93eb2e2d80628180c1f549cf2bc200db2bbea71546
font_01_sfnt_off0000639c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639C 18180 bytes
SHA-256: 299a62b7b8cef16814811db76aecd627148e83bc9a8193bfa16de613314a92eb

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