Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a749f7620d6b635…

MALICIOUS

PDF

36.9 KB Created: 2021-05-20 15:55:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 85d069256974e2571af1b5a8d8d63bd0 SHA-1: 6d2836553d2607fe218384a80a8cece5ef5db3cb SHA-256: 1a749f7620d6b63553c75ad43b07b32f03352e78ae5baf445bb7f04761bd684b
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The document body reinforces this lure with similar phrasing and includes a call to action to access a generator. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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-change-your-name-on-roblox-for-free-game-hack In PDF document text
    • http://galletta.com/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://galletta.com/images/pubg-uc-qatar_GM1330123889.pdfIn PDF document text
    • http://galletta.com/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://galletta.com/images/coin-master-hacks-no-downloading_GM406889139.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_off00003170.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3170 25160 bytes
SHA-256: 79222869b57feafad4b9c3550f417e460039ba9ad0d54f0164617fc6804c80f9
font_01_sfnt_off00006bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB6 19356 bytes
SHA-256: 46dbaf38c2934d32573e6b2165b3ea5430dcd60e12112d7b0d2bfe059cc09281

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