Malicious PDF — malware analysis report

Static analysis result for SHA-256 05485aebbcd06958…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 14:53:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3af850d7cbdf557a998555ed6e265969 SHA-1: ec615bcdc453db4b34faebe93a3f1f39d3502c11 SHA-256: 05485aebbcd06958e4dca4a158c2227be9a16628beb04497ad7bcd91b56f626d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are identified as malicious redirectors or part of a link farm for game hacks and cheats. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise the malicious nature of the links. The primary goal appears to be directing users to potentially harmful content, likely for phishing or malware distribution.

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/431946152/roblox-a-game-hack In PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-robux-july-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robuxab-top-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-gui_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/como-descarar-roblox-hack-para-pc_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-money-on-roblox-bitslicer_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-do-you-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-a-free-virtual-world_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robux-cheat-codes-2021-pc_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-free-download-apk-softonic_GM479516143.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 22504 bytes
SHA-256: bbacc7a00236fe2240b8a0a0870b374c40bb27bc09da1115ef669c42344047b6
font_01_sfnt_off00006223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6223 18484 bytes
SHA-256: a95df912d9a51278cddf4d13674ad29103f5defba35cc7118de0a05d6b7c30a2

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