Malicious PDF — malware analysis report

Static analysis result for SHA-256 599cedad92c313eb…

MALICIOUS

PDF

36.5 KB Created: 2021-05-10 11:46:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d77a2296221dace8b074aacc8b723982 SHA-1: d99177a8f0e5b0b939c215361c406fb12b4e777e SHA-256: 599cedad92c313eb0f122bef0e759bd793f8d9a9781b8ba84550aea7c9b30cd2
170 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'Coin Master game hack' and impersonates Facebook to trick users into clicking a link. This link redirects to malicious infrastructure, indicating a credential phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/406889139/daily-free-spin-link-in-coin-master-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/406889139/daily-free-spin-link-in-coin-master-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000035df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35DF 24036 bytes
SHA-256: c685db814c65b51c735ffcaa8e3d8a9ce9d29b7ef0a0690d1c8cb4115ebf51c4
font_01_sfnt_off00006caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAA 18476 bytes
SHA-256: 1e8814a3a9c151bdf60a3b46a089903ecd16e44c20b3405f8f464f8da5050efe

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