Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8956697cd62932…

MALICIOUS

PDF

35.6 KB Created: 2021-07-01 22:02:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 657bfa9b8abb264b5050cf6b4de56baa SHA-1: 68a5ec0ead43314adf9234a216558181579535b2 SHA-256: dc8956697cd6293258404321c0991688f66e2ab20cab1903a9bfaa6f48343038
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The primary link, http://netcdn.co/app/431946152/want-free-robux-copypasta-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering lure designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/want-free-robux-copypasta-game-hack In PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-genrator-no-human-ferfacon_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/how-to-hack-for-more-cash-in-roblox-tycoon-games_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-roblox-free-play_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-gampasses-roblox_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-robux-no-waiting-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/roblox-ha-sido-hackeado-por-john-doe_GM431946152.pdfIn PDF document text
    • https://i-photo7.com/image/data/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A8 22936 bytes
SHA-256: 40d59512e27a459288493d7178d0c0d6e19760f6ddf809b399d3790f83ec3ef6
font_01_sfnt_off00006526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6526 19376 bytes
SHA-256: df9cedcb7c67d438da89cdf496ab262c5745b607d52026ee05fe0869952cecd3

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