Malicious PDF — malware analysis report

Static analysis result for SHA-256 89988862642a6a7a…

MALICIOUS

PDF

37.2 KB Created: 2021-05-10 20:45:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0db958ea5d75e448a3fbf80c52d87543 SHA-1: 2a190042e5f6ad5e9133a6aab1b77834f96a01b6 SHA-256: 89988862642a6a7a4b2f3d7c3dd1e0864725e55997531950366621fdb24cdd37
130 Risk Score

Malware Insights

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

The PDF file contains a lure for a 'free generator / game hack' that redirects to malicious infrastructure. The document body and embedded artifacts suggest a social engineering attempt to trick the user into visiting a malicious URL. The presence of a download button lure further supports this phishing-like behavior.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/479516143/free-multiplayer-minecraft-server-game-hack In PDF document text
    • https://code.giftcards.comIn 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_off00003668.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3668 25588 bytes
SHA-256: 8458d817a44cc8686f06aa1bb647ce5f9b4c2ca8bd73a68cd2190eb25207c44c
font_01_sfnt_off0000706b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706B 18252 bytes
SHA-256: 15432e288a3c492c6d4ea8af11726bc455bd5b0901c9f366813dc1a1d3aad7a5

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