Malicious PDF — malware analysis report

Static analysis result for SHA-256 713a96d5141d26bf…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 19:34:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 88c1a9b4f38c008f6b3f287aff21ca6a SHA-1: 1fc52d786080ce64cac151bee6810fd086198f12 SHA-256: 713a96d5141d26bfbf7fd93698d56863d83868cb67a8a8ec4c6fc5e38e86dc75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and generators, directing users to a known malicious redirector URL. The ML classifier also strongly indicated maliciousness. The primary IOC is the malicious redirector URL used in the lure.

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/hwo-to-hack-roblox-for-free-robux-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-ninja-legends-groups-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-robux-now-free-robux-generator-com_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-jailbreak-cheats-noclip_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-daily-free-spins-link-today_GM406889139.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_off000030e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E9 21936 bytes
SHA-256: 19d97166e89db0023d10aabdfc75788a2d09bd906b54759294fe8c57204219b3
font_01_sfnt_off00006162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 19124 bytes
SHA-256: 0b685497b7c5d93fc82e0635f4ff371b74d90e71e0324c3649f4d6f04253f26e

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