Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a6a1dcb985dbf84…

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 12:52:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ac9a654aa88564af03062f4d84d3b816 SHA-1: 69fe16df62822c27696b13ed4955cde248773d5e SHA-256: 6a6a1dcb985dbf841d363dbcab9004f3173aacb04ccb2f1bbb1443769576500a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as generators for free in-game currency and hacks. The primary lure is for 'Coin Master' and 'Roblox' related cheats. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful websites.

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/coin-master-daily-free-spins-link-today-2021-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-without-surveys-or-offers_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-games-free-online-games_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-you-doing-l2-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/cheat-codes-for-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-download-vermillion-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hack-peoples-account-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/pokemon-go-fake-gps_GM1094591345.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/freerobux-co_GM431946152.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
stream_002_off000031fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FA 22720 bytes
SHA-256: 911708efbd1bce3c89571c9497c891db3a3a36690c646fabd2694bd508cd742d
font_01_sfnt_off000064d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D7 19344 bytes
SHA-256: bda18ad7bc028b2989dfdc10c84b9c87c1dbf0242a88a3a6fbf9217f203e509c

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