Malicious PDF — malware analysis report

Static analysis result for SHA-256 35848518bbc35a06…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 20:26:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9124ed5b2afc876dd2210d34e29f9700 SHA-1: 1c33de7f6312d4bf17763515f52d06ce8dc827f2 SHA-256: 35848518bbc35a066c299b0055369d13de1c41b3f7a1fe3d093a9675d9e64427
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts numerous other malicious PDF files. The document body and embedded links strongly suggest a phishing or scamming attempt, likely to lead users to further malware or credential harvesting sites.

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/coin-master-hack-app-2021-download-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-2021-september_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-no-generator-ios_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-zombie-rush-hack-script_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-obc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-with-code_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-e-free-command_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_off0000316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316D 22840 bytes
SHA-256: 44397a89032a95af19f53b8404a9bbbab7984efe80f964289da53076281412eb
font_01_sfnt_off00006494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6494 19160 bytes
SHA-256: 08c3d26020315796c296df9400c9a2a920b0dbbe4ac3986bc7fb3bd2c9b27f96

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