Malicious PDF — malware analysis report

Static analysis result for SHA-256 11dfd5a182b4068f…

MALICIOUS

PDF

40.0 KB Created: 2021-05-23 01:09:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fa956cf74028f08d99ac1b211dc54397 SHA-1: 13fa4000b6110e9ace7211dffe6e5f36ef4e46a7 SHA-256: 11dfd5a182b4068f4512991ac7bf83aabf6377a61e615a3988fe973c75c33a0f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that are identified as malicious redirectors, specifically leading to a 'free generator / game hack' lure. The document body and metadata confirm the use of wkhtmltopdf, and the primary URL points to a site offering a Roblox hack. This indicates a phishing attempt to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0143

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-apocalypse-rising-hack-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_002_off00002f0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F0E 25632 bytes
SHA-256: 760a28a47ab8d9da1eaff8295d06e4d576da5f9df729699b285a8cfb553fd82d
font_01_sfnt_off0000691d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691D 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_02_sfnt_off00007929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7929 18948 bytes
SHA-256: c81671b47ab5e7fd402c3d16699df98b51b9b699798839031d1ff55305a8bd80

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