Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddc1a68486f5d37…

MALICIOUS

PDF

44.9 KB Created: 2021-06-04 01:46:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4df642fa385a6d90d87da998d967e8ed SHA-1: 08d61c5d8e28ee20cc33ffdc1a37437ab0127918 SHA-256: bddc1a68486f5d374e6f61b6840a294533cb666266e97e2348ac143acfbc4577
220 Risk Score

Malware Insights

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

This PDF document is designed as a lure, using the promise of game hacks and generators to trick users into clicking a malicious link. The document explicitly requests recovery secrets, private keys, or saved passwords, indicating a phishing or credential harvesting attempt. The embedded URL leads to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.online/app/406889139/coin-master-spin-link-today-game-hack In PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/pokemon-go-free-nickname_GM1094591345.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.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_off000051ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EF 25420 bytes
SHA-256: 8427f5e0be573d724c2b9b19d7a165903100247009c143d2092460fe67b8d303
font_01_sfnt_off00008cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC4 18244 bytes
SHA-256: 07d8e2c3dd01b07826262084699e95bc4377ad43729695123e376372715a200b

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