Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a62349389e4afb…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 11:57:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9cdef2069101f09bf26b6e9ca99fd2ce SHA-1: af8eb3ed179d59ab222dbc49e50bbb7568fcc3f6 SHA-256: 84a62349389e4afba32f236fc9e1be32dee317449322d9a5164fa4733e8a4485
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.tw/app/431946152/free-robux-with-no-verification-2021-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-skins-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-one-piece-millenium-stats-hack-script_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/tiktok-free-crowncom_GM835599320.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/archery-master-3d-unlimited-coins-hack_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
font_00_sfnt_off00002dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDA 22644 bytes
SHA-256: e2e1ac558b141767507465c0c98c88196b76fe5c4d649efb0d5e17dbf05b5a9c
font_01_sfnt_off00006043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 19840 bytes
SHA-256: bf7c23b41782422fa131bc9f6708f01af46f806364d2ae517c2179326a085b42

Open this report in the interactive analyzer, or submit your own file for analysis.