Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94fd4faf753d2b9…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 06:56:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dc5035c3ad880780cd92f87a83ce9044 SHA-1: 4d3b34fea5355c1be90ae731235ea2e2e087e4ec SHA-256: c94fd4faf753d2b9590432f14b7e769df87da5be39722fdf89465aafc0566983
160 Risk Score

Malware Insights

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

The PDF contains multiple links, including one identified as a known malicious redirector, leading to a 'game hack' lure. The document body and heuristics indicate a deceptive attempt to trick users into visiting potentially harmful websites. The ML classifier strongly supports the malicious nature of this PDF.

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.co/app/431946152/camping-2-hacks-roblox-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-does-a-roblox-account-get-hacked_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/what-are-the-effects-of-free-robux-scams_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-press-g_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-to-get-money-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/game-guardian-hack-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-with-no-coupon_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pubg-uc-with-jazz-cash_GM1330123889.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_off00002fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB0 22692 bytes
SHA-256: 37473fa4e1edc6754590e1935f1df48e07e8dca69715577c40eacbb793d767e1
font_01_sfnt_off0000628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 19336 bytes
SHA-256: a40ecaebe8995b679a0c39b43b6177b7be9fc449d336f0cd1db3efaa44ee7736

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