Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba3d170506754b0…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 01:21:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0a4f46dbd096a555598fd3e06c1690f0 SHA-1: aee82b1a947e3f3fc9c22c75f6d3cb2405a5b9bd SHA-256: 5ba3d170506754b05caf855868226f0485b620bb779f8877cc3a1bdc1175bbc9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as free game hacks and generators. The primary lure URL is https://netcdn.xyz/app/406889139/free-money-and-spins-coin-master-game-hack, which is part of a link farm designed to attract users through SEO manipulation. The document body, though partially garbled, contains text related to 'free money and spins' and 'game hack', reinforcing the deceptive nature of the links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/free-money-and-spins-coin-master-game-hack In PDF document text
    • http://uctovnictvosnv.sk/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/robux-now_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://uctovnictvosnv.sk/images/500-free-spins-coin-master_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_off00004bf3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF3 25720 bytes
SHA-256: 191ed758cabb79772afe3a151f843a2d88bcdfdf552c8410df49abdf01b0ae73
font_01_sfnt_off000084d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D8 18240 bytes
SHA-256: 525102074b705849839f7d5611fdda8b0861bf7ff3fecfbcca1449f40502e068

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