Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc74e5960132cfd…

MALICIOUS

PDF

42.2 KB Created: 2021-05-11 20:27:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c2bae6cbc207b5dfc63f12b79f81762b SHA-1: 30ca5857dade209b11f95d22ec3d254f442183bb SHA-256: 6dc74e5960132cfd314cfd0ea6a4b78ed61e6eaab032954d569882f1e287be7a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that lead to game hack generators and known malicious redirectors, as indicated by the PDF_GAME_HACK_REDIRECT_LURE and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The document body and extracted URLs suggest a lure for free game currency or hacks, likely intended to lead users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the ML classification point towards a malicious PDF designed for user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-spin-blogspot-game-hack In PDF document text
    • http://eooe.gr/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/robux-in_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://eooe.gr/images/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_003_off000049bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BB 24756 bytes
SHA-256: 56b2f4dff93cfd9783725f849f963d37b1cdad997e90f2af801cd053db984f0c
font_01_sfnt_off0000824e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824E 18300 bytes
SHA-256: da6108506d645fcbe3414e0c69cdcf67670a59a1c8ef58446631e8e12bd9067e

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