Malicious PDF — malware analysis report

Static analysis result for SHA-256 da537647f1953e1a…

MALICIOUS

PDF

33.9 KB Created: 2021-06-30 09:00:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8696263d9c8bd6c9901bd0198d0ba8bf SHA-1: 7cdb51bdf6673d77e5b14ac68c1acaff8a2ea7d6 SHA-256: da537647f1953e1ab223d7cea5f70d4c97fafef90440ef040cd94c8f126c547c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free in-game currency to trick users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/comment-lancer-proxo-hack-roblox-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware or credential harvesting. No scripts were extracted, but the PDF's nature points to T1566.001 (Spearphishing Attachment) as the likely initial access vector.

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.co/app/431946152/comment-lancer-proxo-hack-roblox-game-hack In PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/i-want-free-robux-visit-this-site-www-roblox-us_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-ipad-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hacks-para-roblox-hospital-roleplay-30_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-stuff-in-roblox-the-game_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hcbb-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/pubg-uc-mongolia_GM1330123889.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-hack-into-a-lost-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-marshmello-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/noob-vs-pro-vs-hacker-vs-god-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-booga-booga-fly-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_off00002f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F14 21880 bytes
SHA-256: ed7636ab29f807423dae8c7844e2f4ea71e417a771dd53a8193ece3cd1eb0f2b
font_01_sfnt_off00005f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F38 19172 bytes
SHA-256: e774e021d29c2fbdbe31cb6684eceec9247362569946b4919b7ba4136ad97846

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