Malicious PDF — malware analysis report

Static analysis result for SHA-256 3812a3c5e162566f…

MALICIOUS

PDF

46.8 KB Created: 2021-06-09 16:09:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 75c7c0ebad88aa16e3b791083bb94e6b SHA-1: aa3f00e7269d66ec128ab4169f3fe10dcc2d475b SHA-256: 3812a3c5e162566fa015e51a204bb4068bd683fd8b25d8bdcf18c4270459cab9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as 'game hacks' and 'free item generators'. The primary URL, https://netcdn.tw/app/431946152/how-to-make-free-shirts-on-roblox-game-hack, is identified as a malicious redirector. The document body, though truncated, also contains this URL, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a deliberate attempt to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/how-to-make-free-shirts-on-roblox-game-hack In PDF document text
    • http://daskrimti-jabar.web.id/library/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/scripts-for-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/jojo-roblox-items-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/hack-coin-master-for-free_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5196 23844 bytes
SHA-256: 6d5f991ab41d4b6d4aefe66f8088dd104f4ec92a00d665a083f2014fcd9d73a4
font_01_sfnt_off000087d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D9 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00009204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9204 19096 bytes
SHA-256: 16c298155ed58a9ceab7ce7a31249da27a311f5d93bbc40064f7e54ab14e5ed8

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