Malicious PDF — malware analysis report

Static analysis result for SHA-256 b623c62e031d31b1…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 04:50:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ed33c30f3e3287bfe17bd59a33491a54 SHA-1: ea96613c6c2a5111154430ce314960fad8cefa58 SHA-256: b623c62e031d31b12bcdfd4b2d1a2d000756213af1e7fe74c363e3182f96bc0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and potentially malicious content, masquerading as game hacks and generators. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs are indicative of a phishing or malware distribution attempt. The document body and heuristics suggest a lure for free in-game currency or cheats, which is a common social engineering tactic.

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/roblox-com-hack-game-hack In PDF document text
    • http://library.atim.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-gift-ard-pin-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-blue-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-all-the-clothes-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-the-streets-hack-on-xbox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/who-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-hilton-hotel-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-sad-cheating-story-albert-he-cried-on-video-new_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/f3x-tools-hack-roblox-fe_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hackers-that-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/tuto-roblox-hack-robux-2021_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_off0000305c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305C 22116 bytes
SHA-256: 552f29cdec68be87ce0c45a50f3e66a190d3dc1a35491df53ca65d27fb86dcf3
font_01_sfnt_off00006167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 18916 bytes
SHA-256: 9cb05533f98f4e2367072af5f88feb3ab929c06b5a26e3a671612f35ad90b071

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