Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64971c2cb0c8e22…

MALICIOUS

PDF

40.2 KB Created: 2021-05-07 02:01:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f29f6ce27c11433acbda6d647e9c0a96 SHA-1: 4056fb0ccfd13630c5ec8b25806f8931b2f850a4 SHA-256: c64971c2cb0c8e223b07168b50cc7166aa7d4cbb0233bcdc752b6b1c52fab658
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and text referencing a 'Free Robux And Tix Generator 2021' and a call to action to download. These links point to known malicious redirector infrastructure. The primary lure is a common scam tactic to entice users to click malicious URLs.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-robux-and-tix-generator-2021-game-hack In 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_003_off000033b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B2 25636 bytes
SHA-256: 78c299a2989488ba80257b2220f802991dd6e291471a42dd728fe1df4d1df297
font_01_sfnt_off00006e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E34 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00007adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADC 18436 bytes
SHA-256: 0f6d5d9c0595598167ed347e59d229fe4c01e00829e2da58f433d8667667fd96

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