Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8b0e791fcecca1…

MALICIOUS

PDF

49.0 KB Created: 2020-04-10 05:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5a2edab85c1607da05e1a17fc48aad2f SHA-1: 39ed78f32759c8a66ed9552cecf681ae132cf3f7 SHA-256: 8d8b0e791fcecca1e50d949bcb22206671308df3a97099ac450bc16a40cf4fc6
70 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified as a link farm, designed to direct users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary intent appears to be redirecting users to various PDF files hosted on different domains, likely to distribute further malware or engage in phishing.

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://ttmusb.com/uploads/1/3/0/8/130874411/130874411.html#geography+for+dummies+online
    • http://kgmakingthecase.com/uploads/1/3/1/4/131483118/d2adb1bb7155.pdf
    • http://morethanacatch.com/uploads/1/3/0/2/130271054/vijavara.pdf
    • http://avhealing.com/uploads/1/3/0/4/130476565/xipemibi_segesupevi_zebewe_putonagisafil.pdf
    • http://danegeneralcontractorsllc.org/uploads/1/3/1/0/131070712/zuxamijafulas.pdf
    • http://hubmiller.org/uploads/1/3/1/4/131406708/dunafepemen.pdf
    • http://paintittucson.com/uploads/1/3/0/6/130604306/tolurejodafole.pdf
    • http://doprettydarngood.com/uploads/1/3/0/6/130604256/5259548.pdf
    • http://karishkreations.com/uploads/1/3/0/2/130272394/c37df7be6.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_off000081e3.bin
63db824d96f25954be290a01dee676a8dddba0abac6cf06d98aa55452b4d0b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E3 8216 bytes
font_01_sfnt_off0000a1ba.bin
45c39c4315a5d00962143d4102937301eb2649728d6de39b959633cfc30365c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BA 16144 bytes

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