Malicious PDF — malware analysis report

Static analysis result for SHA-256 698525f5914db766…

MALICIOUS

PDF

33.4 KB Created: 2021-07-06 17:02:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 171f405588114ecdce4be1ff5c526af1 SHA-1: aa5080a903c9c6812af327f4f63860ebcaff6238 SHA-256: 698525f5914db766a2926c63440eb07c60e20c403975b0d98dbb83d55c7d055b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous embedded URLs and a primary external URI pointing to a site offering 'free Robux gift card codes' and 'game hacks'. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to trick users into downloading malware or visiting further malicious sites. The document body, though partially garbled, reinforces the lure of free in-game currency and hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-gift-card-codes-game-hack In PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-get-1-million-robux-free-birth_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-roblox-virtual-item-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-snippet-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/robux-free-gift-card-org_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-get-free-obc-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/hawt-sauce-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/auto-clicker-for-mac-roblox-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/videos-on-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/how-to-get-free-robux-2021-november_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/mr-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/hack-to-get-clothes-in-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/best-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-hack-robux-apk-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-roblox-download-no-admind-password_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/rhs-money-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-expire-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/roblox-hacks-mpgh_GM431946152.pdfIn PDF document text
    • https://perpustakaan.unitomo.ac.id/repository/free-online-robux-generator-no-download_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_off00002f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0D 21096 bytes
SHA-256: 760a4ab9062ad55067037d955707631eda3b0ce36bce4b48ae5f6075cd7de8b1
font_01_sfnt_off00005d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D16 19112 bytes
SHA-256: a9b7dd84bf9e82aea66064645c2f0ef7c8831366a8baade96afcbb6aebc803c0

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