Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc6b260b762c4dd…

MALICIOUS

PDF

40.8 KB Created: 2021-05-10 11:07:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6378dec3ad36a628f61fde45d1530ec2 SHA-1: 65b03e9c6a1985b12117756d20d7bdc44d5122ca SHA-256: 3fc6b260b762c4dd8b98f8f9a366a070ac151b11989012054c79f433134927c3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating a lure for a 'free generator' or 'game hack', directing users to a known malicious redirector URL. The document body text and embedded links reinforce this phishing pretext, aiming to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/479516143/minecraft-java-server-hosting-free-game-hack In PDF document text
    • http://www.freenom.comHeyIn 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_off00003359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3359 29184 bytes
SHA-256: b820da9c51d452303655128dace653ed22635c770f80c7337e295fe69073063b
font_01_sfnt_off00007429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7429 2904 bytes
SHA-256: 5fbde6171a92e6cc98f84863f07c030480ad871829fa32080c2401c6889d237a
font_02_sfnt_off00007e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E36 18276 bytes
SHA-256: 5e44962821fb2565cfe95a9f549b7a0fbd0587c00345fc69eb3db563df392af4

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