Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24373a2c7ffd2c7…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 14:13:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5bc48e5b84114bf0deb6c693583eb141 SHA-1: 2f0477111405e36b3f1f4c14ed825564eced7fb1 SHA-256: a24373a2c7ffd2c74b283db34c45aba2d411f8481c29631046f977ababe58295
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs, with a primary redirector identified as malicious. The document body and heuristics suggest a lure related to game hacks and generators, aiming to trick users into clicking malicious links. The ML classifier strongly indicates malicious intent, and the presence of redirector links points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-many-levels-are-there-in-coin-master-game-hack In PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/free-robux-no-human-verification-no-app-download_GM431946152.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/como-usar-hack-en-los-juegos-de-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm//repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stikes-bhm.ac.id/perpusbhm/repository/free-51-robux_GM431946152.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_off000036ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36AE 22524 bytes
SHA-256: 16bc4cd1d9707e813ccd3b23e845da08fe76e9351c70187cf92b1815c78578bb
font_01_sfnt_off00006891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6891 18532 bytes
SHA-256: 35d21f570b2421a8526b40319913078b309fed384c82c331c81c396a42604e45

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