Malicious PDF — malware analysis report

Static analysis result for SHA-256 b707c0cd2cb0c90f…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 11:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5147eb047c3c4a7c51bb7e9b8d67b0c9 SHA-1: 94a0cd5a795c60805174da829df0cda583559a11 SHA-256: b707c0cd2cb0c90f85ee39278933727607849abeb4e9b65c2162979d5db1eefb
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free currency, including a known malicious redirector. The document body and heuristics indicate a lure for potentially unwanted or malicious content, likely designed to trick users into downloading further malware or visiting phishing sites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.tw/app/406889139/coin-master-free-coins-and-spins-hack-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-2021-spin-link_GM406889139.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-computer-only_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-summer-event-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-use-cheat-engine-in-roblox-snow-shoveling-simulator_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-how-to-get-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-hack-july-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-robux-2021-no-verificationand-no-apps_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/cheating-on-broken-bones-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/snapes-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/pubg-770-uc-hack_GM1330123889.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/hack-para-la-annimasion-de-ninja-en-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/bloxxer-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-i-get-free-robux-rbxrewards_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
stream_002_off0000333f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x333F 23404 bytes
SHA-256: 060e66a1ca13a7d63c41cbc08f058568667d536fc853fd08fe0f2c94e8e872c4
font_01_sfnt_off00006827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6827 18520 bytes
SHA-256: 29c1b28c0a710d6b876e8a0d8218f7449662a67bbf5932a86ad74a08bedf9ae4

Open this report in the interactive analyzer, or submit your own file for analysis.