Malicious PDF — malware analysis report

Static analysis result for SHA-256 2546c26e06ab251e…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 22:27:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 33285f9c04af7e1ad7be907dc10b3fbb SHA-1: bf82cc93da8ce99f2c4e17fa634aa558406638e1 SHA-256: 2546c26e06ab251e9699e1daa802f0c4a9040b180178a82a4ed5c40866a60064
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-hacks-to-get-spins-game-hack. The document body and heuristics indicate a lure for "game hacks" and "free generators", suggesting a phishing or malware distribution attempt. The presence of many SEO-optimized PDF links further supports the malicious intent to drive traffic to potentially harmful sites.

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.tw/app/406889139/coin-master-hacks-to-get-spins-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-on-roblox-without-paying_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-many-tiktok-free-folowers-make_GM835599320.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-noob-t-shirts-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-on-roblox-without-verification_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/pokemon-go-free-metagross_GM1094591345.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/client-sided-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/cheat-lumber-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/cool-items-roblox-free-and-how-to-get-them_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/vibe-train-roblox-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-on-ipad_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_off00002eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB0 22152 bytes
SHA-256: 8c82aaf3f3764ac272fd9d153499ff8056d14d1f50ef0574d9c513a3391b0f6c
font_01_sfnt_off00005fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBD 18180 bytes
SHA-256: 9341c07bf1f8ec385911b2e687c8b56254d6f249b14268b148005ae7d066e883

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