Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa49426330e0ce1…

MALICIOUS

PDF

39.4 KB Created: 2021-05-25 06:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7f68e2a55aac7d1d965c93b119abacac SHA-1: b871797bbc041ae714104f1097af822c183a1f77 SHA-256: 3aa49426330e0ce1e220996a31a43ee5db3b4ec7899608a56d7cbad0f3f09c3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector related to game hacks. The document body also contains text and links that promote 'free spins and coins' for games, indicating a lure to entice users to click on these malicious URLs. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious redirection or download workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/406889139/coin-master-free-spins-and-coins-daily-game-hack In PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdfIn 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_off0000352a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x352A 24796 bytes
SHA-256: f26b7c73b3c53e393bc3e0d3418f678673257d314e1cdc2e60ef9f2204300ce4
font_01_sfnt_off00006d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8C 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off000077b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B6 18480 bytes
SHA-256: e9052e0f9c593188345ba389179451ef12c6c6a401d56a628cce0964dfd3917c

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