Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc43a4eda3cfe23d…

MALICIOUS

PDF

42.2 KB Created: 2021-06-13 22:56:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 88c7a3671922459d9fd2989391502df2 SHA-1: c9171c181eda1c8876ea6cdd7344b3eee79276aa SHA-256: cc43a4eda3cfe23dba1b3302f2021e0030021a4793fa38b4f76627c1ae2586cd
200 Risk Score

Malware Insights

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

This PDF document employs a lure of 'free Robux' and 'game hacks' to entice users. It displays a fake CAPTCHA, a common tactic to trick users into interacting with malicious links. The document contains multiple embedded URLs, including a primary redirector at http://netcdn.co/app/431946152/how-to-get-free-robux-1-min-game-hack, which is flagged as malicious infrastructure. The overall workflow suggests an attempt to deliver a second-stage payload or lead the user to a scam website.

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 http://netcdn.co/app/431946152/how-to-get-free-robux-1-min-game-hack In PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/pubg-uc-global_GM1330123889.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/roblox-cc-hacks_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/rbx-website_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/i-hacked-my-haters-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/how-to-hack-in-roblox-jai_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/play-roblox-free-online_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
stream_003_off0000456f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x456F 26872 bytes
SHA-256: 96382b0c9ef21dc50ecc3cb185e07764c81c337effea54ce7704ba471f3ea61d
font_01_sfnt_off0000816a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816A 18704 bytes
SHA-256: 20a1407e05406cbfaabfa04fa7d5a0f62c061ed2231cc2b5208d31d7b741ef86

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