Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7c0a3ae076a267…

MALICIOUS

PDF

35.4 KB Created: 2021-05-20 07:49:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 08617de2c1b581845d6dace23bb2c9ad SHA-1: 2ea483291a9232c5f511945ef7f410179673f457 SHA-256: 4a7c0a3ae076a2676eb99c2a0fac2d149d9de6ea65f6674031e725efef05099a
130 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 game hack redirect lure, pointing to malicious infrastructure. The document body explicitly mentions 'Server For Pubg Uc' and 'CLICK HERE TO ACCESS PUBG GENERATOR', reinforcing the lure. The embedded URL is known to be associated with malicious redirectors, suggesting the primary goal is to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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/1330123889/server-for-pubg-uc-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_002_off00002f5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F5E 25252 bytes
SHA-256: d021a61d8cdb71fe8450385918c9e298d297d25f0cbeeb554b281abbc48ee909
font_01_sfnt_off00006960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6960 18316 bytes
SHA-256: 13f2b8b3b8001e7d9fa23caf9492471f59faab906842885b856f388ae80746ae

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