Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc443fa1434caf5…

MALICIOUS

PDF

49.1 KB Created: 2021-06-11 06:15:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7dfb399aabdeb0291378b5629267db85 SHA-1: 1f72d5b77b36031d3d3d86c6550191eff45bc1fc SHA-256: 0cc443fa1434caf57f42321547bd5f6b837615ca4a5ab4b98651a0933b9fda73
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body and extracted links suggest a lure for game-related cheats or hacks, which is a common social engineering tactic. The presence of multiple links to external PDFs, some with numeric slugs, indicates a link farm designed to attract traffic and potentially lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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.
  • 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/easy-roblox-tix-hack-game-hack In PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/inr-to-uc-pubg_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/boku-no-roblox-remastered-hack-chose-quirks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/play-minecraft-pocket-edition-for-free_GM479516143.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
stream_004_off0000520a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520A 36652 bytes
SHA-256: 04f810f6ef66019b7a7c091334be6c925900e8f1770249fd86904be4570298e1
font_01_sfnt_off0000a37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA37A 18484 bytes
SHA-256: 3cc5064ade1d7e29cc33be0d51cde9bec9b6cb2c6c21117c2b0b00ed87137b69

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