Malicious PDF — malware analysis report

Static analysis result for SHA-256 7792d7e9878ce204…

MALICIOUS

PDF

49.6 KB Created: 2021-06-03 07:21:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6529245330ee7967e3e814717acfc536 SHA-1: 622f9532cf250fad35e0dda54695d3db08e15dcc SHA-256: 7792d7e9878ce204fd8dc31922514c741b72def53b851f47a95a135c78e5d198
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including one to a 'free generator / game hack' lure. The document body also contains similar luring text and embedded URLs. The presence of multiple external links suggests a link farm or redirection to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/431946152/how-do-i-get-free-robux-on-roblox-game-hack PDF link annotation
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://uimedan.ac.id/assets/ckfinder/userfiles/files/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005388.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5388 28840 bytes
SHA-256: f7b1df297b48081c534c767dba31e6d1ccb33de91f430d32ec489a695e24a025
font_01_sfnt_off000094be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BE 2888 bytes
SHA-256: dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca
font_02_sfnt_off00009e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E92 18524 bytes
SHA-256: 4ccd670e6a0bad46446eeab730d71d218c542e1f5d690955267ad9a8693a3722

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