Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f07ed32ebc5041a…

MALICIOUS

PDF

35.6 KB Created: 2021-07-08 01:39:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d3bd227d1967a002bfd42f5a871871e3 SHA-1: 57feb3bf8ce317ff815dfb57237a77945d1689ca SHA-256: 6f07ed32ebc5041afab481301167d301fe19f2640e2ca8123feec63482af0f4a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically targeting users with a 'free generator / game hack' lure. The embedded URL http://netcdn.tw/app/406889139/https-iosgodscom-topic-20214coinmasterhack-game-hack is a known malicious redirector. The document body also contains numerous links to other potentially malicious PDF files hosted on infopromotransvision.com, suggesting a phishing or scam campaign. No scripts were extracted, but the primary attack vector is the malicious link.

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/406889139/https-iosgodscom-topic-20214coinmasterhack-game-hack In PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/roblox-mad-city-hack-script-download_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-robux-for-free-2021-pc_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-a-hacked-account-back-on-roblox_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/hack-roblox-rose_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-free-robux-easy-2021-pc_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/roblox-mod-hack-tool_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/roblox-imagine_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-do-you-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://infopromotransvision.com/ckfinder/userfiles/files/candy-ice-cream-simulator-roblox-script-hack_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_off0000327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327B 22768 bytes
SHA-256: a8b7a655eee0222e70af869bd2ea82aaf2a20ce04bbfd8770eed291e0c94b0db
font_01_sfnt_off00006593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6593 19244 bytes
SHA-256: 08ea946be5fb008c0d7bd008b3af5890e72ea8b0061f58924028e5c31f25d00a

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