Malicious PDF — malware analysis report

Static analysis result for SHA-256 44197b45341a0597…

MALICIOUS

PDF

39.2 KB Created: 2021-05-22 10:41:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 983bb8808a9f89160ed8e39c050a7575 SHA-1: 94897bcb2c2257020bccc2c719315df74576edc4 SHA-256: 44197b45341a0597fc5ce8a4f774a1f90385ea74024e370cb5cde1bb669581ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising a "free Robux hack generator". The document body also contains similar lures and calls to action. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves social engineering to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-hack-generator-game-hack In PDF document text
    • https://www.dressel-immobilien-mv.de/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://www.dressel-immobilien-mv.de/images/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • https://www.dressel-immobilien-mv.de/images/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://www.dressel-immobilien-mv.de/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://www.dressel-immobilien-mv.de/images/como-hackear-coin-master-sin-verificacion-humana_GM406889139.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
stream_002_off000032c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32C0 25164 bytes
SHA-256: 651f9c0c1ced9bde3306c6a7ee82973c8f9fbd9da4c686ddbbb2563669cbea57
font_01_sfnt_off00006d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D57 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7708 18516 bytes
SHA-256: ac45002ee2c78c55a094f6344a5e95abe10f4ed7f4298fc77d5376065a98214b

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