Malicious PDF — malware analysis report

Static analysis result for SHA-256 e700913498cdb81d…

MALICIOUS

PDF

37.9 KB Created: 2020-06-14 02:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 42ed08d9d26284ea067fba283c1a892b SHA-1: 68bc85228a720bee696c4b6e5f4c7b906deb5b24 SHA-256: e700913498cdb81d3c679bd99e4bebc3adf45d29fcfd06b13dff0a9b358d47c7
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or host malicious content. The document body contains garbled text and embedded URLs, reinforcing the nature of the attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://kteamtransportservices.com/uploads/1/3/0/2/130287536/130287536.html#conductivit%25C3%25A9+d+une+solution PDF link annotation
    • http://mx.jennings-art.com/uploads/1/3/0/6/130639875/4f5c1c4d5a48ec.pdfIn PDF document text
    • http://mernineameris.com/uploads/1/3/0/4/130436402/sotuloluj.pdfIn PDF document text
    • http://mail.campagnolobiondo.com/uploads/1/3/0/8/130814984/zivezabag.pdfIn PDF document text
    • http://krowncuesllc.com/uploads/1/3/0/2/130273571/3304125.pdfIn PDF document text
    • http://youth.rjconline.org/uploads/1/3/0/6/130605440/funudarixadifo.pdfIn PDF document text
    • http://shop.caldwellcigars.com/uploads/1/3/1/4/131407316/e3968769a.pdfIn PDF document text
    • http://mail.bicknese.com/uploads/1/3/1/3/131379360/7626009.pdfIn PDF document text
    • http://daytonacondosandhomes.com/uploads/1/3/1/4/131453907/cf2f799d90c29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bomixifago.files.wordpress.com/2020/06/27611291220.pdfIn PDF document text
    • https://mifowoxar.files.wordpress.com/2020/06/98077865972.pdfIn PDF document text
    • https://nitapid.files.wordpress.com/2020/06/97501859566.pdfIn PDF document text
    • https://tezaliloja.files.wordpress.com/2020/06/pawolude.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000665d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665D 11376 bytes
SHA-256: fae693aeb9734ff7377e4dbc3b4c1dbdf0fa05d89c0941c3b0cc442d2cbfb662