Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea90371f9165c392…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 02:01:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3d2355ea05b246cff28da537e4601b1f SHA-1: d9148d7154cc051fb13ed3370a3abc150f570376 SHA-256: ea90371f9165c392332e90b0184086c5cf34e29b8959aac44bee905a970937e8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on game hack generators and free currency sites. Several heuristics indicate the presence of malicious redirectors and SEO link farms, pointing to a phishing or scam campaign. The document body and extracted URLs strongly suggest a social engineering pretext focused on popular online games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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/roblox-hacked-accounts-list-game-hack In PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-no-human-verification-and-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/easy-boy-fat-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/roblox-how-to-get-infinite-robux2021-no-hack-no-cheats_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-hack-roblox-to-have-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-promo-codes-december-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-hack-mod-apk-unlimited-spins_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_off00003271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3271 22800 bytes
SHA-256: b23ae295bd528d55898047c6cbfda00d8146c02eb8a28b026f80383a7627f2c7
font_01_sfnt_off000065d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 19196 bytes
SHA-256: 2354f61238ce38ceaa6bb2dc8bd62f8c720a6367dd27d5b4fd20c885c9a0b347

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