Malicious PDF — malware analysis report

Static analysis result for SHA-256 8155d13ceddf0320…

MALICIOUS

PDF

33.7 KB Created: 2021-06-30 01:52:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 47fe25820c226e8d59272da63f16cb04 SHA-1: 3cef4d11f23e60f4e21dec1b528cfe8d5bce1178 SHA-256: 8155d13ceddf0320151781ff0d5c002408bad787dcbb19df59f7fec05f75e7a8
200 Risk Score

Malware Insights

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

This PDF document contains a launch action that redirects to a known malicious URL, masquerading as a game hack or generator. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring the user to click the malicious link, likely to download a secondary payload or redirect to a phishing site.

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.
  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • 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/roblox-rape-hack-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-roblox-outfits-for-boys_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/case-clicker-hack-roblox-script_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/pubg-uc-gift-card-free_GM1330123889.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/launch-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/robux-premium_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-points-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/como-conseguir-robux-hack_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-on-kindle-fire_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-10k-robux-for-free-2021-july_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/someone-hacked-into-my-roblox-account_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_off00002f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3B 21944 bytes
SHA-256: 8def7c18cfe49cc0722d0567699a23843dc0d6e021a462af2c2e49615260c973
font_01_sfnt_off00005f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F41 18832 bytes
SHA-256: 3ac3cfabc938180400d0abf1f56cc3fab268d3e1a7375c8f9738c83b811e0b8b

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