Malicious PDF — malware analysis report

Static analysis result for SHA-256 cefa91ccedaf03d2…

MALICIOUS

PDF

34.7 KB Created: 2021-06-30 02:27:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d31b068e9d503e694b18b17fe3f195ff SHA-1: dc190e9b9bf2d8adcdfccb5628d5b7193ecb0490 SHA-256: cefa91ccedaf03d2bb1a32a24c3c6ba8571f21d905c34c73c4fd455042d87b25
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. It contains numerous links to redirectors and SEO link farms, including a primary malicious redirector at http://netcdn.co/app/431946152/edit-this-cookie-roblox-hacks-game-hack. The presence of a 'download button' lure further supports the malicious intent of leading users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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/edit-this-cookie-roblox-hacks-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-on-hilton-hotels-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-into-others-peoples-acoount-on-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/comment-installer-un-cheat-sur-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-usernames-and-passwords-for-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-for-passes_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/millitary-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/pokemon-brick-bronze-roblox-hack-phone_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-one-piece-treasure-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-android-zephplayz_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-john-doe-when-they-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-money-hack-tool_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AF 22320 bytes
SHA-256: 6d798cd1463a096091fc1fe00dda45433826e59dbcd6b681369f70ce1334ff12
font_01_sfnt_off00006229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6229 19220 bytes
SHA-256: ebe112372bae4396332ff19e55e1512c773c3b370493fe5c568f92854315c069

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