Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42a88072cd1c823…

MALICIOUS

PDF

36.8 KB Created: 2021-05-21 22:05:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7eb731027f057b0e04c039bcb42ec654 SHA-1: 7d9a4b926bfd55376fdda458720bc55fd5238d2d SHA-256: e42a88072cd1c82341e379d5ce779f3beb0049abf75ab2dd44bbbf4b1ae0ffd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or generators. The document body and heuristics indicate a lure to trick users into clicking these links, likely to download further malware or engage in phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-robux-no-verification-or-survey-2021-game-hack In PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/hacks-for-minecraft-windows-10_GM479516143.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_002_off00002fbc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FBC 25464 bytes
SHA-256: 37a9dbb289c3014ceddb873fd985b46e5bd5708b02c28b62b6f45577d786bda5
font_01_sfnt_off00006b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3D 19296 bytes
SHA-256: 8ae3a64377bb3499e06ef2dc6ba5ce98d8bac2a4cf46517fa6b68a3eec67b541

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