Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f7f7583ba44f5f…

MALICIOUS

PDF

37.7 KB Created: 2021-05-10 11:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dc6b12c1263a7b084a45d8d1bef14e51 SHA-1: d78a44fd4e2528d581dce726127a2684bad1b111 SHA-256: 00f7f7583ba44f5ff44e264355db366278d6df29eb41e7b8492d43a7d3fcf376
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'free generator / game hack' lure. The document body and embedded artifacts also suggest a fake CAPTCHA or human verification prompt, designed to trick users into clicking the malicious link. The embedded URL leads to known malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/make-robux-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_003_off000030dd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30DD 28528 bytes
SHA-256: d828646e381a4bdf0bef4b81b22d9c87f1230b91f1efc287f42dc02bd9ffa47e
font_01_sfnt_off00007174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7174 18444 bytes
SHA-256: d485cf64ce85db08f49cebe049b1af1977bd392e7b632f71036820545e301f0d