Malicious PDF — malware analysis report

Static analysis result for SHA-256 42931953319f2d56…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 22:19:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cec9f9de6b34e8f421cb850ff3eb1432 SHA-1: 52f10bac0d0af39f7c5fc24a38cd03313a37abd7 SHA-256: 42931953319f2d56f65ff5220047e29861af308f2f20ebcfda7cbbb3f522d5c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and generators to trick users into clicking malicious links. The primary link redirects to known malicious infrastructure, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack.

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-online-hack-generator-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/run-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/pokemon-go-free-rare-candy_GM1094591345.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-clothes-pants_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-any-roblox-item-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/secret-skin-combination-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hacks-livestream_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/robux-free-computer_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cute-roblox-faces-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-gamepasses-roblox-cheat-engine_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_off000033a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A2 22740 bytes
SHA-256: b61f174bdb67373b32bbce3317be9d9c8d3c94eefebab2f82f823675ac430513
font_01_sfnt_off0000666f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666F 18080 bytes
SHA-256: cd600620ffe18aceb987849ae263b25f24730e2c60818ae74d1c2f10ec990b1a

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