Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2bdb951e1fb4398…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 16:05:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ac783977f43f276528fde5f9b9c68948 SHA-1: 7d7fa9b7a1311e63806bc9a452ba13169a2c0bac SHA-256: a2bdb951e1fb439887c3484d3033fbe9ad3ec68e482e4c45572aa85b456ea83a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, likely serving as a lure for users seeking free game currency or hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious workflow. Although no scripts were explicitly extracted, the document's structure and embedded URLs indicate an attempt to redirect users to potentially harmful content.

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/get-free-robux-com-game-hack In PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-dominos-on-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-hp-notebook_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/pokemon-galaxy-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/hackear-prison-life-roblox-2021_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/2021-lvl-ro-ghoul-in-roblox-cheate_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/jack-hack-robuxcom_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-free-robux-codes-pastebin_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-apps-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/new-free-items-in-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-antlers-on-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-roblox-pc-2021_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-duffel-bag-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/hacks-roblox-jailbreak-mode_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-mouse-auto-clicker-for-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/admin-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-hack-tool-apk-download_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/hawt-sauce-roblox-hack_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-god-hack-2021_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-brick-bronze-cheat-engine_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-coins-in-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FC 21888 bytes
SHA-256: f69eac1f87458d5c0564ad03dd4369db46b33dc4731484f3a16bd16c5cc00183
font_01_sfnt_off0000622c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622C 19080 bytes
SHA-256: bd48df5b3587c62f460ac4547970d78652d76b982da8f06603591dccd4bca80f

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