Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fd79f4cb129ace…

MALICIOUS

PDF

50.0 KB Created: 2021-06-11 07:44:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a2ab3d2948558b4832c4729e277c9a8b SHA-1: d2ab22b3214785f4930e0d0a1d19a1ce62adc08c SHA-256: 95fd79f4cb129ace7947dd248672f1ab7b72010a0b3b424fc02f44ea4f8cd82d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/bandicam-free-robux-game-hack In PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-medieval-hood-of-mystery-free_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-jailbreak-cheats-2021_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/without-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/exploit-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54E4 26276 bytes
SHA-256: 7b29b4e27233e943d9aa442527e0162a8decc0f4d255eb2ba9bfefbf93d0881d
font_01_sfnt_off000091ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91AE 4096 bytes
SHA-256: 036e0223d0f018055e4279b305dbb890ae17020e84bbdf2481b5b3f0f607535f
font_02_sfnt_off00009f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F41 18796 bytes
SHA-256: d64ece035683358804bceace3f583c670ff5a7e2609f1438b095d5f8595258c5

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