Malicious PDF — malware analysis report

Static analysis result for SHA-256 05365ae65d98d365…

MALICIOUS

PDF

40.6 KB Created: 2021-05-15 00:17:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4640d0ac0570fff58cb8bd03690a94e4 SHA-1: 8519d02cb732b21aa12508f42932b0af45454f04 SHA-256: 05365ae65d98d365700f33270fafa4186f85deedf4259e4c7c00b8c4de7eb49c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into clicking on what appear to be game-related hacks or generators. These links redirect to malicious infrastructure, specifically a known redirector. The document body and embedded links suggest a scam aimed at tricking users into visiting potentially harmful websites, likely for ad fraud or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-free-chip-game-hack In PDF document text
    • http://arch-centr.ru/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://arch-centr.ru/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://arch-centr.ru/images/coin-master-free-daily-spins-and-coins_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_003_off000047c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C2 23752 bytes
SHA-256: bd0a146035613a9fbb00a4e7f698c574d574a6ee308f20f5a4421eae508c946a
font_01_sfnt_off00007d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1F 18052 bytes
SHA-256: ba3acf3ed697f48690604da7cc833c5df3eb06befc0ffeb0890f4c11738fad23

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