Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad38049b2656766…

MALICIOUS

PDF

34.2 KB Created: 2021-06-30 05:57:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9819f604b3330271338a74387d8ec1a7 SHA-1: 09c38dd156fa78d69d02c13cfb321791b33acac0 SHA-256: 6ad38049b265676617c9af6384e2d1ce8b8a56f0bdaacc5276299c8935666c7f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as game hacks and generators, with a primary redirector pointing to 'netcdn.co'. The document body and heuristics indicate a lure for free in-game items, likely leading to a phishing or malware download site. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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.co/app/431946152/roblox-btools-hack-jailbreak-game-hack In PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-do-the-walk-through-walls-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-using-inspect-element_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-gamepasses-all-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-hack-generator-2021-that-i-can-download_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/howto-get-free-robux-without-survey-and-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/unsopported-smoke-flight-roblox-free-copy_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/muscle-roblox-manequin-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/spped-hack-2021-october-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-no-inspect-or-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/pokemon-go-free-zapdos_GM1094591345.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-event-items_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-in-roblox-easy_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-apocalypse-rising-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-do-you-get-free-roblox_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_off00002f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F90 22092 bytes
SHA-256: 5a09a2e374e9f8fb708f51dc86fdc20ee2bb44385983f23234b0d232e3521654
font_01_sfnt_off0000606c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606C 19044 bytes
SHA-256: f155012fd920b974e1dbaca008cfbb87cdd78056d2320ac08bc8cd8f8cb7c341

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