Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32aeb0b851b6b01…

MALICIOUS

PDF

37.2 KB Created: 2020-03-19 05:24:05 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf5721543ccc57b4036ee7101c617e0c SHA-1: 76cbc0ba6349deaa9fff45aa407852136284f691 SHA-256: d32aeb0b851b6b01d5afef8d3d24cf2647df7efecfce697ebeda33a1b115e2c1
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO-optimized PDF links. One of the embedded URLs, 'http://agape-physicaltherapy.com/uploads/1/3/0/4/130476873/130476873.html#nikon+coolpix+aw120+firmware+download', suggests a lure related to firmware downloads. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind these links.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://agape-physicaltherapy.com/uploads/1/3/0/4/130476873/130476873.html#nikon+coolpix+aw120+firmware+download
    • http://maysmemories.com/uploads/1/3/0/5/130550777/wawetebomesezidena.pdf
    • http://www.artitianupcycles.com/uploads/1/3/0/7/130739340/xuxivegabe.pdf
    • http://thearchitecturalgardendigest.com/uploads/1/3/0/8/130814673/6306582.pdf
    • http://voelter-s.de/uploads/1/3/1/0/131069860/6914407.pdf
    • http://doubleeroofing.org/uploads/1/3/0/3/130379424/da0cbecb.pdf
    • http://www.signwizz.com/uploads/1/3/0/5/130590537/2011868.pdf
    • http://salvis-pupusas.com/uploads/1/3/0/4/130483924/kuderetajesu_xagef_dekigezif.pdf
    • http://summitatrailroadsquare.com/uploads/1/3/0/6/130639331/ladiwa_puwobepobonitix_romev.pdf
    • http://www.allisonevansphd.com/uploads/1/3/0/9/130969663/8632151.pdf
    • http://hostmaster.plane-lease.com/uploads/1/3/0/3/130323281/2b507cd142.pdf
    • http://marinalavrova.com/uploads/1/3/0/9/130969916/34d1c9f687254b.pdf
    • http://alphamotors.com.br/uploads/1/3/0/2/130287919/raporekovukasikanige.pdf
    • http://spanish-expressions.com/uploads/1/3/0/6/130621702/delomibetelavol_foregufeved_negeruka.pdf
    • http://quailridgecommunity.net/uploads/1/3/0/5/130539981/1854538.pdf
    • http://manymaplesfarm.com/uploads/1/3/0/5/130588923/veliwo_rufipumix_vazajaxi.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a4c.bin
40ec53cd9278843d8e021be33482a52ebcca777858b495ce95b7be333a20c048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4C 7532 bytes

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