Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b2f75a31e6d3d2…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 04:35:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5e9799f1867d18752509b1108c780ecd SHA-1: 4abf3a1b69b5444adc03ee952245724fe9bd1eb6 SHA-256: 29b2f75a31e6d3d29f698e60ba7094ba7497b91ef861d6ce5e636f29f30d4f9d
160 Risk Score

Malware Insights

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

The PDF contains a lure for free game currency or hacks, directing users to a malicious URL. This URL is flagged as a known malicious redirector, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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.tw/app/431946152/get-free-robux-without-doing-anything-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/robux-free-hack-pc_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hacking-in-parkour-in-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-ultimate-driving-free-cars_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/arcane-adventures-roblox-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-hack-rpg-games-in-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/mobile4free24-24com-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/buy-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-private-server-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.semrush.com/prices/In 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_off00003236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3236 21872 bytes
SHA-256: 51f2c48eb09a8b6247b3745c9206b482ce28c2b83cbeb4320c536df218e143d9
font_01_sfnt_off0000626f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 19652 bytes
SHA-256: d01fab7bff865e1e572a69531771b19011470ec9dd60cfeb54f37c62aa9fdbeb

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