Malicious PDF — malware analysis report

Static analysis result for SHA-256 045c26a155713f33…

MALICIOUS

PDF

43.3 KB Created: 2021-05-10 19:09:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 226bc3f0bd05f68f0f173d6755b84ab8 SHA-1: ee10254c7ca964aee99c4c6501a8d8cdf0673b33 SHA-256: 045c26a155713f33338ade1b6c0df6332160e70383741d417959a0a04ae7f391
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are flagged as malicious redirectors, specifically targeting users with lures related to popular games like Coin Master and Roblox. The document body and embedded URLs suggest an attempt to trick users into downloading or visiting malicious sites by promising free in-game items or hacks. The primary attack vector appears to be social engineering via a malicious attachment, leading to further compromise through redirectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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 https://netcdn.xyz/app/406889139/free-spin-coin-master-game-game-hack In PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--regg-blumen-thb.ch/images/coin-master-daily-gift-free-spins-and-coins-link_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
stream_003_off00004815.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4815 28408 bytes
SHA-256: ec3f93a8118ea66f41b911707f1b29086807478d178f3ab27bf017c43cecbaa4
font_01_sfnt_off0000878a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878A 18148 bytes
SHA-256: 05f474a5dd778b1a8f82bb3f3194e0f6909204339d3dcef5442e6da61b36e890

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