Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1202f6e2ebdf74e…

MALICIOUS

PDF

33.8 KB Created: 2021-06-18 05:36:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b1ad6f80bd2c355ec5120d97df98d232 SHA-1: 88ca8e863661828e96c46a811cc4b2144b93826c SHA-256: a1202f6e2ebdf74e235b0f9b92be3581bf6aff548d5c90cb321174c5485876c9
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 http://netcdn.co/app/431946152/final-stand-2-hacks-roblox-game-hack PDF link annotation
    • http://kita-sunshine.de/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-unicorn-code-roblox-2021_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/can-you-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/tiktok-free-update_GM835599320.pdfIn PDF document text
    • http://kita-sunshine.de/images/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-tiktok-email-and-password_GM835599320.pdfIn PDF document text
    • http://kita-sunshine.de/images/roblox-hack-generte-202199-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-minecraft-skin-maker_GM479516143.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_off00002c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C93 22496 bytes
SHA-256: 4e9607f35f2be81f2f424cee88cb2456258672e5547f07d33cbe5a0b34c28da8
font_01_sfnt_off00005ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED1 19156 bytes
SHA-256: 84eb722d6897e03d470311fd51d22e2e16e877954083d6c7909e9daa4a8056f2