Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4576abba7e539ca…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 16:14:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 83edaab705af246a1836cc581208d3d0 SHA-1: 145eca7d3341ad55ffd6ac4fb94a2dee74574746 SHA-256: f4576abba7e539ca40f26e7924908b9bd0719332ca05dcd14b965d392da3e00d
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/free-100-robux-code-game-hack PDF link annotation
    • http://ordineingsa.it/images/how-to-hack-the-streets-roblox_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/roblox-promo-codes-2021-december-free-robux_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://ordineingsa.it/images/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://ordineingsa.it/images/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-no-joke_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-shirt-promo-code-for-roblox_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://ordineingsa.it/images/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://ordineingsa.it/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ordineingsa.it/images/robux-free-script_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_off00003025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3025 22124 bytes
SHA-256: 6f1261370abf2de3f59ac5c895cfab1238a9ef6ea3f9870f1d6e56859e4412d1
font_01_sfnt_off00006155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 18984 bytes
SHA-256: 3817e870612410dd5d114d191e675c11bb5a554a3c1b06911c24776a98e85b9a

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