Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d59b00dcabdb7de…

MALICIOUS

PDF

36.6 KB Created: 2021-05-13 21:31:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b14c55542392dc81d1ab4bc494068fa3 SHA-1: d20855db05ab5e2bf1fc47890022715e8c6f7d20 SHA-256: 4d59b00dcabdb7deaebede4dde700589899b61dbb9b2dc1f4f46ea4944c4b3ce
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'Coin Master Hacks Android' generator. The document body explicitly contains a call-to-action phrase and the malicious URL, indicating a phishing or scam attempt to lure users to a potentially harmful site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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-hacks-android-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_off0000358a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x358A 25392 bytes
SHA-256: 493e1360fe7b2107d8362684a7bcaed1b3802134b2e40cf325d18c577945746f
font_01_sfnt_off00006efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFD 17888 bytes
SHA-256: a3f3c6358bf6c689f14a31b2bec7c705949e82e1ea95935703b782b8d0a54cd0

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