Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccef87f30b4b9db…

MALICIOUS

PDF

43.0 KB Created: 2021-05-18 02:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c895e846a975a1c5842f0ee60d43ac15 SHA-1: edbf4a428a68da9d736615752ce42dd5a8d00c39 SHA-256: 0ccef87f30b4b9dbf225d03343893e51a9240d0d35205f5a9250f6fb3584edc3
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, masquerading as a lure for free Robux or game hacks. It also impersonates the UPS brand to enhance the phishing attempt. The document's structure and embedded URLs strongly suggest a credential phishing or malware distribution attempt.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/free-robux-no-survey-game-hack.
  • 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/431946152/free-robux-no-survey-game-hack In PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-blogspot_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/roblox-c9m_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/village-coin_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/optifine-pe_GM479516143.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/minecraft-114-4-download-free_GM479516143.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_off00004b1e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1E 25296 bytes
SHA-256: 0cdd50d343fa5fdd72fc3cbcd84ce73d27531c99879bb86e5d3deb28575acaf7
font_01_sfnt_off000085be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BE 18308 bytes
SHA-256: d3a10f634c5ecc3d7353c949fdf4d39280fe41fff4e373acd575ae0d5bea3c9d

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