Malicious PDF — malware analysis report

Static analysis result for SHA-256 5607caf15624daa3…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 09:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5ed38aec421625862d884314605c571c SHA-1: 85a8e3dafd52232673be3f3d3f1cc68b8ca026c8 SHA-256: 5607caf15624daa35ca9a6003752a552e6f2a97e682f8a9cd48c59ed9b687bfd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free generators and game hacks. The primary redirector URL is http://netcdn.tw/app/431946152/free-robux-giveaway-live-game-hack. This indicates a phishing or scam attempt designed to lure users to potentially harmful websites. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious intent.

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/431946152/free-robux-giveaway-live-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/is-pokemon-go-free-to-download_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-premium-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/escript-executer-roblox-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-girl_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_off00002ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC6 22608 bytes
SHA-256: 98f9be9f7d09bb2fd921efb2ad34aed68d249fa939821dfbe05bf08a17f47b44
font_01_sfnt_off00006166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6166 19296 bytes
SHA-256: 0352292dbcbf26e7fc0de087e3b3baebc7cf90a2f8a47f67a80d89effc18d76e

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