Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d59607374b98b97…

MALICIOUS

PDF

44.6 KB Created: 2021-06-13 18:28:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cf55bfbe3de7f1347b20a5a442199b9b SHA-1: 0f97cf157167d9e7383276c08c704de5152639ea SHA-256: 1d59607374b98b97dcd5e8cd88ac07c4612fe64b7a2dbcce9b9cb32929e57378
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links that impersonate brands like Amazon and lure users with offers of free items or hacks, ultimately redirecting to malicious infrastructure. The primary malicious URL identified is http://netcdn.co/app/431946152/free-redeem-exclusive-virtual-item-roblox-game-hack, which is associated with known malicious redirectors. No scripts were extracted from this sample.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/free-redeem-exclusive-virtual-item-roblox-game-hack.
  • 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/free-redeem-exclusive-virtual-item-roblox-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-everything-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-shoes-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/instant-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/apps-for-free-robux_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
stream_003_off00004c1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C1B 26780 bytes
SHA-256: c556a3764556879e3e7c9341f0e9de5592afab6e35d5f6c9397e88cb824d4ada
font_01_sfnt_off00008949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8949 19220 bytes
SHA-256: 5851147592725c2eb671ad220dfb5e76803758d53c79156481b5114b3c4e07b8

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