Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f45d9516f707bb2…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 11:37:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9eb19c973b660fc9be49adfc1f10ad6d SHA-1: c6663c9164b691e0aecefcb5ff912716bb5ee9d3 SHA-256: 0f45d9516f707bb2efcc7000cf4e08d66d6bb579b3b0aff31e465891f30a1431
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a common lure of free game hacks and generators to entice users. It contains multiple embedded URLs that lead to redirector infrastructure, ultimately pointing to other PDF documents hosted on a potentially malicious domain. The ML classifier strongly indicated maliciousness, and the presence of numerous redirector links confirms a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-free-link-2021-game-hack In PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/robux_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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
stream_003_off000046d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D0 27056 bytes
SHA-256: 9b33f45b7201d8dab1c77a76f0453bc06cc3d4a99d2e0567e794408c8946a0de
font_01_sfnt_off000083f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F0 18284 bytes
SHA-256: be459003f2db1a934c49859962f2962ce704e042ee0985c73311b64c11e09449

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