Malicious PDF — malware analysis report

Static analysis result for SHA-256 9061c6ed641de280…

MALICIOUS

PDF

34.6 KB Created: 2021-05-23 07:08:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 31b6e48a0745aac93be3e0833c407cb8 SHA-1: 1ec4dd17a277cf57afc6577407c7df5fb0ea80a2 SHA-256: 9061c6ed641de28036c305e202c2ea6e552d6c46eac6cfb917145c6152cd1c96
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as 'free generators' or 'game hacks'. The document body and embedded links suggest a phishing attempt to trick users into visiting malicious sites, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/835599320/how-to-get-tiktok-famous-free-game-hack In PDF document text
    • http://precisionheavyhaul.com/images/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/roblox-mobile-hack_GM431946152.pdfIn 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_off000030ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30EE 23376 bytes
SHA-256: 7939b05d7fc9bf149e803c565488dbba189bcc137d9bc19aa7742e341cfd9c9d
font_01_sfnt_off000065ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CA 18248 bytes
SHA-256: 9d8c9ff8f23476e9e897d50e05ba1c89fe9a64794c9c08e4c2e4cb1c87253222

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