Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2fd86a074c45c5…

MALICIOUS

PDF

34.4 KB Created: 2021-06-17 17:03:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8a852ae68e1f901d572b43ac88254dff SHA-1: 742651460a895bbfe3b33f42f88d29d7a6028b86 SHA-256: dd2fd86a074c45c58aaec50478ef58d92e796dd7545bfa2b2a9dc505d76be724
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector, masquerading as 'Robux Hacks That Work 2021'. The document body and heuristics indicate a lure for game-related cheats, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded URLs and link farm structure strongly suggest a phishing or scamming attempt.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/robux-hacks-that-work-2021-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-someone-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/best-free-no-virus-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-on-ipad-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-robux-hack-cheat-engine-64-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-hack-robber-simulator_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pokemon-go-free-and-home-transfer_GM1094591345.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-robux-but-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-bubble-gum-simulator-script-hack_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_off00002feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEB 21608 bytes
SHA-256: 3730ca44d6c9a634d4e6d45a3002ceba726671373afd47c73df5dddd0fd2de36
font_01_sfnt_off00005f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8A 19592 bytes
SHA-256: c5953f9f3795b6b593e37f491f7ca5284695c7ace8721c8a535c334cb49cf612

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