Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6df41f075cd33e…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 00:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 533fb8fd0d8d8b49b253fcd55c16fa36 SHA-1: 03e780064fadb6a3b92847c662319f16e6c3be68 SHA-256: de6df41f075cd33e4da0d387408e943b263359c95b29d5ba60f3058a5251f991
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 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-activegamer-game-hack PDF link annotation
    • http://panaceafamilymedicine.com/images/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/hacking-apps-for-roblox_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
stream_003_off000048f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F1 25116 bytes
SHA-256: 143f2a6aa0e777ea1d8d423f724ca87a5b4c1e01e903617a16ee5170d7b204f5
font_01_sfnt_off000082a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A7 18548 bytes
SHA-256: 3f51c9f1d393cac92505500fdf6fe1c1727df79afd76cc4c19b11b13bc7a8d30

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