Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5963834b5079964…

MALICIOUS

PDF

38.9 KB Created: 2021-05-22 18:17:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 031b6f132a2f09ef7033abef1f788e7b SHA-1: f794c20d3ca80e85046cb6c541e1e8746c6a435b SHA-256: b5963834b50799642fb2f455798bda2fff02b76ce46ebd7d531fc8dcf0480fc2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains that are flagged as malicious, specifically promoting 'free generator' or 'game hack' lures. The document body and embedded links suggest a phishing attempt to trick users into visiting these sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing attack.

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/431946152/can-you-get-robux-for-free-game-hack In PDF document text
    • http://extremeselfprotection.com/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://extremeselfprotection.com/images/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://extremeselfprotection.com/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://extremeselfprotection.com/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://extremeselfprotection.com/images/minecraft-pvp-hacks_GM479516143.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_off00003489.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3489 24900 bytes
SHA-256: 54f717b0288ae0fe043faae6e62eeccbc1242f33bd7d0b06c5909c3cce521921
font_01_sfnt_off00006c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C31 2844 bytes
SHA-256: a66b570a908761b39e6d9e18bcb667c353840a86c6a7db528f79d01abe6b23a1
font_02_sfnt_off000075d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D7 18508 bytes
SHA-256: c061b59ab901ec7c7e5d17bc5fec7ace191fd36e08e64edc0ca642be8bf86a0e

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