Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ef26f044b9c4013…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 16:43:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 58f9db56408de93faf9bb56524808f74 SHA-1: 134dc4d1cadbfcd6ac340340adab058a0e6066e9 SHA-256: 8ef26f044b9c4013570abdbfb28ba901b09966c72f4d4d8954255904f3ec554d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The embedded URLs are designed to lead users to potentially harmful content or downloads. While no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity, such as downloading a second-stage payload.

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/431946152/how-to-hack-in-roblox-prison-life-game-hack In PDF document text
    • http://www.bernerpupping.at/images/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bernerpupping.at/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.bernerpupping.at/images/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.bernerpupping.at/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://www.bernerpupping.at/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/gain-robux_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://www.bernerpupping.at/images/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://www.bernerpupping.at/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://www.bernerpupping.at/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bernerpupping.at/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/real-roblox_GM431946152.pdfIn PDF document text
    • http://www.bernerpupping.at/images/robux-win_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_off000048f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F5 24484 bytes
SHA-256: 9fdad1109ada5a4d1331dc40a6609cfde7ef37fb4a9db654d28690133f035b2b
font_01_sfnt_off00008148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8148 18620 bytes
SHA-256: 06c4a0a22987171f64eaf6d898502a0ddf1128172b72fd679b67faae34548247

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