Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f95a432a35bfd0a…

MALICIOUS

PDF

50.3 KB Created: 2021-06-04 04:24:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 613b989f47d1759f77a5988d10fb48aa SHA-1: d74dd9d57d055176d8f3af84eb34910c4369358b SHA-256: 6f95a432a35bfd0ae35a96217c93a5829de1bdc0eb9b8858779f3bdd5bf12563
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple critical heuristic firings indicating it links to malicious redirectors and lures users with promises of free game hacks. The embedded URLs, including one pointing to a raw IP address, are designed to lead victims to further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/free-robux-group-game-hack In PDF document text
    • http://183.91.70.7//repository/roblox-arsenal-hack_GM431946152.pdfPDF link annotation
    • http://183.91.70.7//repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F1 28376 bytes
SHA-256: 7c6d3abf99a27a5f0ad33210042d72f63786554d2b9a7e295e98c9df708daca4
font_01_sfnt_off0000924e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924E 6768 bytes
SHA-256: fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a
font_02_sfnt_off0000a28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA28D 18192 bytes
SHA-256: 388213afa323ee085de7e38d37e80f389e12e91d2d5a1b35e5038c11a526558f