Malicious PDF — malware analysis report

Static analysis result for SHA-256 af345844e077b9fa…

MALICIOUS

PDF

36.0 KB Created: 2021-05-22 04:07:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ad11a2aa46109625af3f327fb721318d SHA-1: 30ad90c04eb7067d8d14a2713e32c110f2bfc717 SHA-256: af345844e077b9fa414265a694b6ab0515350f924dacf6335c291a8ee76a496f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering game hacks or generators, presented as a lure. The document body explicitly contains the call to action 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' and directs users to a malicious URL. The presence of embedded URLs and the ML classifier strongly indicate malicious intent, likely to lead the user to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/free-minecraft-printables-game-hack In PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/wurst-minecraft_GM479516143.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_off0000352d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x352D 24464 bytes
SHA-256: 44878fbd031ab9e0aa87c176dcf741fd5ea5b95bbd27485a16ee7bc9ec23d33d
font_01_sfnt_off00006cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBF 17956 bytes
SHA-256: e5df45a09fd76c24ea43a7fa28fc5fe559da15feee3d3577044ff876206ae01e

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