Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4910b41b5a2ab2…

MALICIOUS

PDF

38.6 KB Created: 2020-04-16 01:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b41ecd7787e365ca45e051e23f6f9edf SHA-1: a0c5b60e75fe46d93ab77e000c4ad5785c787a27 SHA-256: ed4910b41b5a2ab20c1f251721566c8edae1cdad26bf43b96198f02ca186c80d
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to other PDFs hosted on similar domains, indicating a link farm or SEO spam operation. The presence of a 'download button' heuristic further suggests a deceptive intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a document titled 'case files family medicine 2nd edition pdf'. No scripts were extracted from this sample.

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://espressoaps.com/uploads/1/3/0/4/130483219/130483219.html#case+files+family+medicine+2nd+edition+pdf
    • http://asiatravels.is/uploads/1/3/0/4/130483540/1812088.pdf
    • http://stems2.org/uploads/1/3/0/6/130605182/limefol.pdf
    • http://dnquinn.com/uploads/1/3/0/2/130287976/3ba2c09a9.pdf
    • http://lifelongstudent.org/uploads/1/3/0/8/130874298/f39b53e4.pdf
    • http://balihaidreams.com/uploads/1/3/1/6/131637686/lavoj.pdf
    • http://svk2k.com/uploads/1/3/0/2/130272435/ruzalowonu.pdf
    • http://csdesigns.com/uploads/1/3/1/4/131452878/xebaloxekatoto.pdf
    • http://dnquinn.com/uploads/1/3/0/2/130287976/
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b22.bin
8f231373f58f683064f2b3b56f2137355d0ff4432881e56f251e02c0ab07abfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B22 8796 bytes

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