Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd7755e1b773647…

MALICIOUS

PDF

34.5 KB Created: 2020-04-14 15:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 556fd7323668fdee849e5981dca3549b SHA-1: 603db7f89399d476bf144c2605a2f55459e8ce04 SHA-256: efd7755e1b7736474f6c3fa13619e84a3fa4dbf0ea517cbaabff1aac827c5b8e
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, many of which point to seemingly unrelated PDF files on various domains. This pattern is indicative of a link farm or SEO spam operation, potentially used to distribute malware or drive traffic to malicious sites. The presence of a 'download button' lure further supports this. No scripts were extracted, limiting the analysis of direct payload execution.

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://takachmechanical.com/uploads/1/3/0/2/130272978/130272978.html#basanta+utsav+bengali+movie+free
    • http://doggleggmedia.com/uploads/1/3/0/8/130874094/8961987.pdf
    • http://djglo.com/uploads/1/3/0/2/130272484/medexefadozudafux.pdf
    • http://vasilacorp.com/uploads/1/3/0/7/130775123/mulefosufavemopevo.pdf
    • http://promedicalradiology.com/uploads/1/3/0/7/130740218/bizubaga.pdf
    • http://shields-data.com/uploads/1/3/1/3/131379401/6703508.pdf
    • http://ninjadrone.pro/uploads/1/3/1/3/131384531/4312696.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005481.bin
c8d86a93babf495691ed8a6d60907c96032e59f274d76fd41f5f5cee5171cfbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5481 7800 bytes
font_01_sfnt_off000072e6.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E6 2652 bytes

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