Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a7055bd3efee82…

MALICIOUS

PDF

39.6 KB Created: 2021-05-21 10:51:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7a3d85a17f833a7e1777391b74ecd052 SHA-1: 06aad6d7b19bad8fc991a0248dbac625948b1ee3 SHA-256: 71a7055bd3efee8288c972202029c68e40394bb4ad44205288ea1c808cbe2f43
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a call-to-action button, strongly suggesting a lure to download external content. The primary URL points to a 'hacked client', indicating a malicious intent to trick users into downloading potentially harmful software. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/best-minecraft-hacked-client-2021-game-hack In PDF document text
    • http://vagency.us/images/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/roblox-rules_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000352d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x352D 25280 bytes
SHA-256: 96b61da04fdeecbaf7bffc7f3db48c9457444d90c1f42510c4ccc4b8b8cb57c4
font_01_sfnt_off00006dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off0000783f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783F 18604 bytes
SHA-256: 6a4bfeeb6005d4148602abf6ea83debb02ce542ee7293f3e171eaacbd7f3726b

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