Malicious PDF — malware analysis report

Static analysis result for SHA-256 160b7b39e69878dc…

MALICIOUS

PDF

33.4 KB Created: 2021-07-01 18:47:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 9da8e50d408262357a483ecf6874f7c7 SHA-1: b72253a6b367023b5ed4a71575e48ce648bba3a5 SHA-256: 160b7b39e69878dc7be3b1d094cb1fa8e7c6138550660567f7737fa4106e8c6d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is designed as a lure, presenting itself as a 'free generator' or 'game hack' to trick users into clicking malicious links. The document body and heuristics indicate it directs users to potentially malicious redirectors and IP-based URLs, which in turn host further malicious PDFs. The primary goal appears to be leading users to download or interact with further malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/cheat-engine-hack-roblox-robux-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/can-i-get-minecraft-for-free_GM479516143.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/how-to-hack-roblox-jailbreak-noclip-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/top-10-free-robux-sites-that-actually-worked_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-btool-and-hack-roblox-jailbreak-2021-february_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-ho-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-2021-working-subtitles_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-login_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/i-want-to-break-free-roblox-music-video_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacks-for-build-a-boat-for-treasure-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-cheats-pris_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/can-pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/advertise-for-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/noob-vs-pro-vs-hacker-vs-god-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-buy-robux-for-free_GM431946152.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_off00002fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB5 21016 bytes
SHA-256: dcede65e89fa38524d28d7abf177fc7426bf60d860940f7f4aa01fd3aefccde0
font_01_sfnt_off00005cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFA 19188 bytes
SHA-256: 411a563813e86c8a58fb181b4d8b1504723d412983bbdcc9c0b08be903179342

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