Malicious PDF — malware analysis report

Static analysis result for SHA-256 445f2453c37a5629…

MALICIOUS

PDF

36.5 KB Created: 2021-06-28 18:09:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d13291b2dd445afe984ac4e21e395fa0 SHA-1: a7093e3309b26486db6b81913b10fa4120a758aa SHA-256: 445f2453c37a56290deabd2ff54cc02b0962384aa995d9a4c13c08d842698d38
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which links to a known malicious redirector. The document body and heuristics indicate a social engineering attempt to trick users into visiting the malicious URL. While no scripts were explicitly extracted, the nature of the lure suggests a potential for further malicious activity, such as downloading a second-stage payload.

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.co/app/431946152/free-robux-pc-2021-download-generator-game-hack In PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/are-free-robux-games-botted_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/pokemon-go-free-zaragoza_GM1094591345.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-vip-for-hammer-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-hack-wins-on-roblox-martial-arts_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/nonsense-diamond-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/hack-day-z-2-roblox_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/new-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-hack-on-tower-of-hell-roblox_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/master-coin-free-spin_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
font_00_sfnt_off000034c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34C5 22628 bytes
SHA-256: bc2a4ce1a471e1c1a0fcc35e8a3634344780e678470a5de5bbef90c24f4f2fa3
font_01_sfnt_off00006713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6713 19956 bytes
SHA-256: 760a4f56d76bb781a1b89be91f7da4f3a7e00f02996f05775772046f4c0d1662