Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cd26ab81fbf01d…

MALICIOUS

PDF

36.9 KB Created: 2021-05-13 20:08:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1f2445563d971ea96401033a0e305c56 SHA-1: 7489e05b56e79cd6df34faec05ff42e59250546a SHA-256: 41cd26ab81fbf01d82523420abe196b0bd4896e54079772b7071fd05cc1ca29e
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to a URL associated with 'game hacks' and 'free spins', indicating a lure for users to download potentially malicious content. The heuristic firings confirm the presence of a malicious redirector and a game hack lure. No scripts were extracted, but the document structure suggests it is designed to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0313

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/406889139/coin-master-free-spins-link-2021-hack-game-hack In 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_off0000348d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x348D 25852 bytes
SHA-256: ecaf4113962510830de908efa10f45d7f1cd471a4fbc37b2009535f6f3704aa2
font_01_sfnt_off00006e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E67 18456 bytes
SHA-256: cd0dac1e42acf1dd8fac6ba5781826c7c26695a9ef6d84d4a0ecdd405406f8c6

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