Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb70b595e4336ac…

MALICIOUS

PDF

34.1 KB Created: 2021-07-08 20:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 170bd6f064de49b0ad0fbcb4f5c45fe6 SHA-1: 1714af6225192a4e71bb5fb3fff7ad4ba7e4592b SHA-256: fcb70b595e4336ac54fd6864b7265793c6116560e610c12055ca9799eba6e80d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body and extracted URLs reinforce this theme, suggesting the primary goal is to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted from this sample, but the embedded URLs are highly suspicious.

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/free-coins-coin-master-game-hack In PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/treasure-hunt-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-put-hack-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/real-free-robux-games-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-tiktok-followers-no-survey-or-verification_GM835599320.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/upgrade-to-roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-retail-tycoon-money-hack_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/robux-game-com_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-the-hood-hacks-2021_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-clothes-roblox-codes_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_off00002fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB4 23096 bytes
SHA-256: 0e6b5acbd9ece257a001bac2538f8526c2e9df1243da4fe8484f1e941924f9cb
font_01_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 17996 bytes
SHA-256: db592684bbdaaeb7647633841870edbd5981f70e843d3403859f62ceb8e0c83d