Malicious PDF — malware analysis report

Static analysis result for SHA-256 8283813f74c96ff6…

MALICIOUS

PDF

50.1 KB Created: 2021-05-30 14:42:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8e899bb18794fcfe5277dd748ec3177d SHA-1: 318f34a589e79864598884749af11367ffc90e9b SHA-256: 8283813f74c96ff6ae221dcd6215cefa1b84cdd64e4cdd445c2941fdd143166d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to other PDF files hosted on the 'vissalutis.pl' domain, suggesting a link farm designed to distribute malicious content. The document body and heuristics indicate a lure for free game items or software, likely leading to malware download or phishing. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, potentially leveraging PDF vulnerabilities or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8293

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/how-to-get-minecraft-for-free-on-android-game-hack PDF link annotation
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://vissalutis.pl/wp-content/uploads/fsqm-files/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000585c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x585C 28376 bytes
SHA-256: 577a2133262dc34d1bf8c6f56870a0931da94a82763e6c6ee6fa536de377756f
font_01_sfnt_off00009765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9765 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000a174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA174 18048 bytes
SHA-256: 8059851acc98585c267d1a0730441da2490f7a27bb6efaac05b05bf58a4bb166