Malicious PDF — malware analysis report

Static analysis result for SHA-256 01be90dbbe115a38…

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 05:19:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 68a0bbf4f15bef18f3dd983ab44bd60d SHA-1: da28558787a18385b5e47c2c8e2009a61b1aa182 SHA-256: 01be90dbbe115a3811ffbb088bf5503d3caa8a1a10ee0213ff48d587da0647fe
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a specific URL. It also requests sensitive recovery secrets, indicating a phishing attempt. The document body, though partially corrupted, contains the same lure URL and references 'Coin Master Mod Apk Latest Hack'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.online/app/406889139/coin-master-mod-apk-latest-hack-with-unlimited-free-spins-game-hack In PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/can-pokemon-go-free-evolution_GM1094591345.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005517.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5517 25700 bytes
SHA-256: 3da6ee19d6b5935e40a64fef46746dfafce61c24bb8c6aa6150c14080e6db9b1
font_01_sfnt_off0000901f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901F 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off00009c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C08 19116 bytes
SHA-256: ec39511f044db0039b033061d0c06de0ea4b06e85abf4e03074bae323e4248a1

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