Malicious PDF — malware analysis report

Static analysis result for SHA-256 af22552f275d05cb…

MALICIOUS

PDF

35.4 KB Created: 2021-06-25 19:54:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 058fb7f2f66af02f023a607d10bb63b5 SHA-1: c5358e01a854efc31fbf2bb2c363b658effb1d77 SHA-256: af22552f275d05cbdff7a60a3564f868537442c1dd3cddce923a6b63aeffc7e4
220 Risk Score

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/free-synapses-roblox-game-hack In PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/is-roblox-free-on-laptop_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/best-roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hacker-screen-pc-decal-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hacks-for-roblox-backpacking-beta_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-how-to-get-free-robux-promo-code-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hack-para-tener-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-animations-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-any-costume-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-no-hack-or-human-verification_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-no-human-verification-2021-or-survey-no-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-roblox-like-a-boss_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_off00003314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3314 22664 bytes
SHA-256: ba127b6415e9fb117d135b0027272a310e9ed953ef291fb13eb011849c25890c
font_01_sfnt_off00006579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 19008 bytes
SHA-256: 47f7f4599fce761aa5f75531dada4470b5f981fcf31da673ef30ac1320dbc3bf

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