Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e77ae94286c845…

MALICIOUS

PDF

34.3 KB Created: 2021-06-19 22:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 974bebb5dbaf571ba5bc7d6b5b5bb1ae SHA-1: 07f8c7a6074f20d053d4ddce867746b06921bd74 SHA-256: 53e77ae94286c845000f14a20b77567ab85db91f1f80515d91a28362a5ca1d24
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to entice users into clicking malicious links. It contains numerous links to redirectors and SEO link farms, indicating a phishing or scam campaign. The document body and heuristics confirm the malicious intent to redirect users to potentially harmful content.

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-fight-the-monsters-cheats-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/robux-link_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-roblox-accounts-101_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/pokemon-go-free-daily-spawn_GM1094591345.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-rewards-robux-webs_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-short-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/como-tener-robux-gratis-sin-hacks-facil-y-rapido_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/the-free-game-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-put-cheats-into-big-paintball-on-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_off00002fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBC 22096 bytes
SHA-256: ad2929e43c2214429cf523f28c3651177a6107777c4a7973ff9238018d31c9d1
font_01_sfnt_off000060b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B4 19236 bytes
SHA-256: 3c2be3f4a840a426ac3872c5db701d0ed803dd5dfbb7dd5f1afd4fe1679f417e

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