Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eca483832ee1982…

MALICIOUS

PDF

29.4 KB Created: 2020-03-09 04:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ee2703bdf3ee01f43e61a437b976a9b8 SHA-1: 9f01dcbef087a797adb7ac7d5b135807d702ac39 SHA-256: 5eca483832ee1982c447438ae70f854033c36e0db918c85e9b86ed673ae4d2e6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains URLs that are part of this link farm, suggesting a scheme to drive traffic to these external resources, potentially for SEO manipulation or to host further malicious 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.
  • 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://zelt1.bpmtc.com/uploads/1/3/0/8/130874648/130874648.html#fpdf+convert+html+to+pdf
    • http://pilgrim-funds.com/uploads/1/3/0/2/130289322/kixunuvud.pdf
    • http://beachvita.com/uploads/1/3/0/6/130639082/ba85cd8.pdf
    • http://virtuemart.nl/uploads/1/3/0/5/130541065/murididop_samev_bodevivipibom.pdf
    • http://fairbanks.rentals/uploads/1/3/0/3/130313153/kavajiso.pdf
    • http://eng-kayla-j.pleasingfood.com/uploads/1/3/0/7/130775118/481957.pdf
    • http://nolimitationsyouthservices.org/uploads/1/3/0/8/130874520/7739169.pdf
    • http://dandeliontrade.com/uploads/1/3/0/5/130543373/2ef1b9e2b3f25f.pdf
    • http://fredstavern.org/uploads/1/3/0/5/130590108/simiwozolepe.pdf
    • http://www.dies-und-das-buntekiste.net/uploads/1/3/0/6/130620603/ririb.pdf
    • http://postituptoday.com/uploads/1/3/0/5/130539046/53eef540.pdf
    • http://jacksonholedistillery.us/uploads/1/3/0/4/130483338/dozowuwe-girakidosez-sufif.pdf
    • http://alliedtradinginc.com/uploads/1/3/0/3/130313391/53db90e.pdf
    • http://stylisheventsbyemma.com/uploads/1/3/0/5/130539783/8ef1db8.pdf
    • http://minimalwaste.net/uploads/1/3/0/5/130551059/45d486d.pdf
    • http://seasonedfunding.net/uploads/1/3/0/7/130775694/gelonusudej.pdf
    • http://webdisk.hausofpeacewi.com/uploads/1/3/0/5/130542894/1613483.pdf
    • http://hulan.info/blog/
    • 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_off00005134.bin
bba42eb532117e4991b91357467f4dbfa2f143f50c4292c27730ecf29d221db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5134 5692 bytes

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