Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed04b56770346e89…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 22:51:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c66e9aa28a4820b8ac3ceea29859a782 SHA-1: 1798b07eddbb4ea0307e9b047b9374594c7d0e50 SHA-256: ed04b56770346e89bbe0376885433d5e79c1336fa6db1ec1f7d62ad35d79a8d8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux generators' and game hacks. The document body and heuristic firings confirm the intent to lure users to a malicious redirector. No scripts were extracted, but the presence of malicious links and the ML classification strongly indicate a phishing or scam attempt.

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/free-robux-generator-for-roblox-2021-game-hack In PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/moon-tycoon-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/hack-robux-site-robloxcom_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/how-do-u-turn-of-the-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/roblox-dentist-game-online-free_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/can-pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/robloxpromocode-free-robux_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/treasure-hunter-simulator-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.awmedicine.com/uploaded_files/userfiles/files/free-robux-hack-on-phone_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_off00003143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3143 22300 bytes
SHA-256: 4612acbbc8dd13dce880cadf14b84181cc85544a78794b4c5c4374813d7dee0f
font_01_sfnt_off00006321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6321 19296 bytes
SHA-256: 1c5b5ef18537994d2b9d4bcfadda653dfd61b801510ea22c778e1317dc9212ff

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