Malicious PDF — malware analysis report

Static analysis result for SHA-256 df249ba791065797…

MALICIOUS

PDF

43.0 KB Created: 2021-05-19 22:08:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 656f6a088b11e00904546938b0fff4c0 SHA-1: 24bc84cfdbc02d3e9e2bf969414181ee42ee5a8b SHA-256: df249ba791065797273aa38742cee22571dd75f4c0beb97519893c1c122b3d5d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to malicious redirectors, masquerading as game hacks and free currency generators. It employs a fake CAPTCHA lure to trick users into clicking these links, which likely leads to further malicious content or exploits. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-spins-no-verification-game-hack In PDF document text
    • https://www.kambati.co.za/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.kambati.co.za/images/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/get-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-coins-spins-on-coin-master_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_off00004bee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BEE 26116 bytes
SHA-256: 96d315d6b3f89545d39912b5ed00c22dbcde49c633d208db393ca7cc85843034
font_01_sfnt_off000086bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86BF 18020 bytes
SHA-256: 3fc8e712472bedc95e33b1ebb168eee1fa4dc7350c3476e9ae694c4447b57514

Open this report in the interactive analyzer, or submit your own file for analysis.