Malicious PDF — malware analysis report

Static analysis result for SHA-256 b743cae6788d9838…

MALICIOUS

PDF

42.3 KB Created: 2021-05-20 02:18:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 808bd682207a554a180a5e0a5c97731b SHA-1: 7ab08510131dbb09284b5deae2c9d08bfc10f595 SHA-256: b743cae6788d9838c0eb7fde3f985eee2f07988c7a1e82ccae6bee7985dbc047
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically promoting 'game hacks' and 'free generators' as a lure. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, indicating a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/479516143/minecraft-life-hacks-game-hack In PDF document text
    • http://grugliascogiovani.org/images/robux-download_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/make-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-fire-tik-tok-2021_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/robux-page_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/freerobux-co_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-get-free-robux-without-verification-or-surveys_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_003_off00004bc0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC0 25244 bytes
SHA-256: 81c68ad2ef4c245f7e1c633cda0f933b071e45d1da4a2e5b5d05d58112de9fb0
font_01_sfnt_off000084b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B2 17740 bytes
SHA-256: a9f228f82f523f82f2ec29969fa693daed0cd9273bc8dad9e6ca4184f04ba0fe

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