Malicious PDF — malware analysis report

Static analysis result for SHA-256 7793888ea6a7046f…

MALICIOUS

PDF

41.8 KB Created: 2021-05-12 19:17:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3c693bf334879de5f5aa15c0939b00a9 SHA-1: be912338fbd0852c9720554096339645d9edfc43 SHA-256: 7793888ea6a7046fc0abc9f8eb14d6b660a4f75839afaa0acc1ee2be64aee95b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that lead to malicious redirector infrastructure, masquerading as game hacks and free generators. It impersonates Microsoft to enhance the phishing lure, directing users to click on links that likely lead to further malicious content or exploits. No scripts were extracted, but the presence of malicious links and the brand impersonation strongly indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/hack-a-game-game-hack.
  • 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/hack-a-game-game-hack In PDF document text
    • http://ptts.pl/images/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/gain-robux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/roblox-gang_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-free-spin-and-coin-links_GM406889139.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_003_off00004824.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4824 25280 bytes
SHA-256: 32d9ef43415e45faac6ef7c6bfb16b8a5cbf40f1dfa70f4a02eee18139040ce9
font_01_sfnt_off0000824f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824F 17856 bytes
SHA-256: 9fd96bc08588ed7ebb523c95e1e7ae68d4a51fb60fc2df2c843e3c05d3b8bc09

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