Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c58b19ac70770ec…

MALICIOUS

PDF

43.6 KB Created: 2021-05-23 01:37:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3a242169fa097fe3b2e04a9c8d71a1e4 SHA-1: cc46cc077739069381778642b7c5c8309791b0a2 SHA-256: 0c58b19ac70770ecb1dad65183c76155814b6bb58605b920ceb5d1676710a930
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded links that redirect to a 'free generator / game hack' lure, disguised as a fake CAPTCHA or human verification prompt. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-no-verify-2021-game-hack, which is part of a chain of redirectors hosted on svadba-moda.kg. The document's content and heuristics strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9585

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-robux-no-verify-2021-game-hack In PDF document text
    • http://svadba-moda.kg/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-easy-and-fast_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_off0000418b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x418B 30436 bytes
SHA-256: aab4b931785a26f169292a9f4b4c84164f741537f3950e40dca926c94e93091f
font_01_sfnt_off000087be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 18848 bytes
SHA-256: 9f147bd5bf62c652754f553854fad05fac0b8df637ce3021f80b740c61e7be7f

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