Malicious PDF — malware analysis report

Static analysis result for SHA-256 b924806ee3cb3928…

MALICIOUS

PDF

50.0 KB Created: 2021-06-09 06:40:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a1844992ec9096044f8dabd00b60cb47 SHA-1: 54cb59da9ad47b22594a0532bde0dddd9d2a13ea SHA-256: b924806ee3cb39287353bc3b4ae9d2f30cad21a668ee9a349a7862fe3e9b76dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains links to game hacks and generators, which are known lures for malicious activity. The primary link redirects to infrastructure identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through social engineering, likely leading to a second-stage download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/infinite-jump-hack-for-roblox-game-hack In PDF document text
    • http://tckontrola.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/hack-client_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-get-free-coins-on-coin-master_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
stream_004_off0000519c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519C 27192 bytes
SHA-256: d7e31d706d3a392e3b696f2daa4547b965b14c923eb9900d122eb66e91a59065
font_01_sfnt_off00009040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9040 4008 bytes
SHA-256: 515da38a799acdefd039af3a0dfb6ec4815b572058c9bd492ec5a77cd7658593
font_02_sfnt_off00009dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCC 19312 bytes
SHA-256: 112648af436c14b5173264a6fa23885f6f936ba560eb417804aab311e385635f

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