Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ec9a128c05f49e…

MALICIOUS

PDF

38.7 KB Created: 2021-05-25 09:31:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4747f7d4b9e1cae632507d1958a9dc9e SHA-1: 93901a36f2b561c0d9d4daa0765cf02779eeb8bc SHA-256: 79ec9a128c05f49e73382feb64a6f25fbdc8a8d47b270eee5bd42b6c4d02cae4
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a critical heuristic firing for a malicious redirector link, impersonating PayPal to lure users with a fake "free generator / game hack". The embedded URL, https://netcdn.xyz/app/479516143/minecraft-com-free-game-hack, is identified as a malicious redirector. The document body also contains text and links related to this lure, including a call-to-action phrase. No scripts were extracted, but the overall pattern suggests a phishing attempt designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0134

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/minecraft-com-free-game-hack.
  • 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-com-free-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002c81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C81 29036 bytes
SHA-256: 66766a8bfd270b074e9b5b114ba2f95a67e2777826daab5234af93771e47b9d5
font_01_sfnt_off00006d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D21 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000770c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770C 17968 bytes
SHA-256: 5bf46a6d08d3ffa684fcf656b6008ff7f2ef06acfe8c47aedee45889ac3be72f

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