Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0c9267da4be5b4…

MALICIOUS

PDF

38.0 KB Created: 2021-05-14 02:07:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: db19202d8fda665e00c15919240487a2 SHA-1: c92bdcee58fe15978f56d8a9234b1ce6fbc1ce02 SHA-256: bf0c9267da4be5b4e1244416034dc9b2c33d2a162665cfc4007732124de0bf61
130 Risk Score

Malware Insights

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

The PDF document contains embedded links and text that mimic a 'Roblox Hack Tool' generator, directing users to a known malicious redirector URL. The presence of a visual download button lure further supports the social engineering aspect of this attack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit users through deceptive content, likely leading to further malware download or credential harvesting.

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/431946152/roblox-hack-tool-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_off0000316d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316D 28876 bytes
SHA-256: 73cb2f29ecc22ef50d1233e956c9fbb785f9eb4c53afd056bc9fa440b78098d1
font_01_sfnt_off0000734a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734A 18184 bytes
SHA-256: 31a2c7908075477008558d8ad35fc874cd0c1469ac409190117581929eec3da7

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