Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6b2aed27535669…

MALICIOUS

PDF

35.2 KB Created: 2021-07-07 11:22:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d27585fdd06cdca326f79df7acf34e9f SHA-1: 2a61071b440edf88df944ff02ab7cdcf0e8ac04a SHA-256: 5d6b2aed27535669787c1518798a0022bdabadba847dde29ce5ce9d003a3ea58
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/mobihack-net-roblox-hack-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/free-robux-100-life-free-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/denisdaily-exposing-a-roblox-hacker-wild-revolvers_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/downloading-roblox-link-free-like-no-money-needed_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/script-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/sites-robux-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-create-your-own-scripts-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E8 22412 bytes
SHA-256: a34c6037c787ac326f4a5c8f957157fd022e6cf07b4c0f36c0baca006e1b28e6
font_01_sfnt_off00006405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 19244 bytes
SHA-256: 88e598bc89789b8ac21b9f126080391bbc9d3fa977fc33123edec0983ecad616

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