Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a766d780b72c3a8…

MALICIOUS

PDF

37.8 KB Created: 2021-05-21 07:09:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a8d9624c0a79dd42a0453c0259d8c80e SHA-1: b6a93efcef0e1898c6704b56aac597024af8ec7b SHA-256: 4a766d780b72c3a857a2e967e3cceac183c72eaeec86422dea29eb1fc0247267
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, masquerading as game hacks or generators. The document body and embedded link targets suggest a lure for free game items, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely leading to further malware download or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-roblox-toys-game-hack In PDF document text
    • http://sbm-nn.ru/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/daily-free-spins-for-coin-master_GM406889139.pdfIn 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_002_off00002eac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EAC 31196 bytes
SHA-256: b916e1127301f2ac0acb1e8b0b80c14fbbce6f460ef37da7ab47d899b89b9b46
font_01_sfnt_off000072e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E1 18128 bytes
SHA-256: ced59fa1f5966ac3cb16d2fbea4d1e317d998f5f31502ffb274740285f9cbd45

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