Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41eec770a7fbfaa…

MALICIOUS

PDF

47.3 KB Created: 2021-06-13 21:20:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 623071ef5b82e16971b0bec7be668f3e SHA-1: 450c0545a5b6f2ed815b5aabb2e289788a5f61a1 SHA-256: d41eec770a7fbfaaf87452d7ccb414121cd844e69a73079f8f085553ab93c085
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and domains hosting potentially malicious files, disguised as game hacks and free downloads. The document body and embedded URLs suggest a lure to trick users into downloading further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/hacks-for-roblox-high-school-game-hack In PDF document text
    • http://falconshipping-uae.com/userfiles/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d71.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D71 25116 bytes
SHA-256: b5b7e26b2070c0308bf90f210e1ec66c80ab8d74a430b1b9af36bcae7fb64e70
font_01_sfnt_off000086e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E2 4156 bytes
SHA-256: 237a42045d5f1fa2fbb552a0aac286d72ad96437b53c39f1a27942643eb543b4
font_02_sfnt_off00009490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9490 18920 bytes
SHA-256: d99707562adb9905689b129c44fa41d04a9a43ac891c4c2974fa2e1e5bc4e4bd

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