Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0a37adf7d2a955…

MALICIOUS

PDF

37.1 KB Created: 2020-06-21 22:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b248acc98b4141bede224a70f32728a5 SHA-1: 1f99f7909ef71a8a22e6f3c7ed85a1ce9e3ebb1d SHA-256: 1c0a37adf7d2a95556aee31f5d757aea2f147ae2a82f09ff61ecfeaf8a0a8d40
152 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection 'Pdf.Dropper.Agent-9253353-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs are likely used to host further stages of an attack or to distribute spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • ClamAV: Pdf.Dropper.Agent-9253353-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9253353-0
  • 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://outdooritalia.net/uploads/1/3/0/2/130270901/130270901.html#will+the+iphone+5+have+siri+yahoo+answers
    • http://antivirus.parkroadbaptistcdc.org/uploads/1/3/0/7/130775619/b243a6406.pdf
    • http://elitestaffingprofessionals.org/uploads/1/3/0/8/130814729/274362.pdf
    • http://amicoffeecompany.com/uploads/1/3/1/1/131163623/2466464.pdf
    • http://imagemeetsintegrity.com/uploads/1/3/1/4/131437628/guxod_romip_bajogedivaselo_zuxituzideminer.pdf
    • http://cineaspartgeamu.com/uploads/1/3/0/5/130589036/ruxogal_fakujibumiri_winesame.pdf
    • http://nhweddingdresses.com/uploads/1/3/1/0/131070651/5879578.pdf
    • http://happyhaloglobal.org/uploads/1/3/1/3/131379946/9fd860.pdf
    • http://cpanel.zaitoldme.com/uploads/1/3/0/6/130604527/delovufugubeb_veguluxemewu_nawogerugow_xalemutiwe.pdf
    • http://alurijoyas.com/uploads/1/3/0/6/130621156/8dd706016b24dd.pdf
    • http://cpanel.vkinspections.com/uploads/1/3/0/4/130476573/zuvosamibib.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_off000052e1.bin
ba824b5279f3334f4f8cbf9aa774d9798407a35a72ae37b4ff4c6c522652e160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52E1 5088 bytes
font_01_sfnt_off0000642f.bin
6aff89f9ac3a088e72863f46962d6a8260c259f24a7fe40a52e8682425927fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 10444 bytes

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