Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1878ed9f10a4e20…

MALICIOUS

PDF

35.6 KB Created: 2021-05-20 20:43:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 165dabedcf6b313f8d31d11123263cc5 SHA-1: 773ed13196a67acdc99862dfe0ba88e1800355df SHA-256: a1878ed9f10a4e20ee884d2f70adcdac96e24836c2b646d55a2aa369db2c4335
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 malicious redirector link, specifically pointing to a 'free generator / game hack' lure. The document body contains text and a button-like phrase ('CLICK HERE TO ACCESS ROBLOX GENERATOR') that reinforce this lure. The embedded URL leads to known malicious infrastructure, indicating an attempt to trick users into visiting a compromised site, likely for further exploitation or credential harvesting.

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/431946152/roblox-printables-free-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_off00002f16.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F16 25452 bytes
SHA-256: aa5a03f5e4aef241e49345be33577df94f232fc8b25f6c4958bee33774e5761e
font_01_sfnt_off0000695c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695C 18552 bytes
SHA-256: b5ee65cd5901ad7693dfafde0b4a4a2e01b57e67b0b7341f09a29d5f18e40ca4

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