Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa880129b7a2a40…

MALICIOUS

PDF

40.3 KB Created: 2021-05-23 17:07:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 92e9467ddfc77ae0a9a62a79c0ba175c SHA-1: 037d3de9f12222dee6db750087f66f88581ff6e5 SHA-256: daa880129b7a2a405977d8657459e8305e382c524bc8d5f8127254ea4153b57f
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The heuristic firings indicate that these links lead to known malicious redirectors and are part of a lure to trick users into clicking. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/how-to-get-free-robux-hack-game-hack In PDF document text
    • http://agritrade-ukraine.com/images/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/demon-roblox_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/roblox-games-that-give-you-free-robux_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_off000032ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32AE 33900 bytes
SHA-256: 3a9984f41363a7293842975c2094c982f3abacf909c8cc3fdc760dddf745317e
font_01_sfnt_off00007b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B76 18680 bytes
SHA-256: 94830d128a2a842b7d907871b5b30233810e9b8beb569ce3f786f2ddb63eaed4

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