Malicious PDF — malware analysis report

Static analysis result for SHA-256 9786aed5fd3b3302…

MALICIOUS

PDF

42.7 KB Created: 2020-06-14 12:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 443d21653b7c790c2b5f97f7ac752669 SHA-1: 55f401400830b0cbebfb3748f85a54ff9e3f48b5 SHA-256: 9786aed5fd3b3302eb83772a494938b6da4bd1a6d97fff25c069489f6469c5e5
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The document body text mentions 'Flexibility exercises golf', which appears to be a lure to disguise the true nature of the document. The primary function seems to be acting as a link farm, potentially for SEO manipulation or to distribute further malicious content via the linked PDFs.

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://spinwerk.com/uploads/1/3/0/4/130483537/130483537.html#flexibility+exercises+golf PDF link annotation
    • http://twokingsconfections.com/uploads/1/3/0/4/130489342/mifep.pdfIn PDF document text
    • http://melrosebootcamp.com/uploads/1/3/0/6/130639706/fuxenozoxatokoru.pdfIn PDF document text
    • http://downtownautoservicechemainus.com/uploads/1/3/1/4/131483245/woxadox.pdfIn PDF document text
    • http://vintageglampergirls.com/uploads/1/3/1/4/131453405/d53a824a5130.pdfIn PDF document text
    • http://cpcontacts.mypennylaneus.com/uploads/1/3/0/7/130775443/20a64.pdfIn PDF document text
    • http://carriepolkinsuranceinc.com/uploads/1/3/0/6/130604780/51fecb30a64b919.pdfIn PDF document text
    • http://thecalmnesscoach.com/uploads/1/3/0/7/130740522/deteguzevo.pdfIn PDF document text
    • http://adsl-65-71-85-37.lawsnakard.com/uploads/1/3/1/4/131454089/donemunozativure.pdfIn PDF document text
    • http://pluggednetworks.co/uploads/1/3/1/3/131383777/d6245e09936f92.pdfIn PDF document text
    • http://kidslovebiz.com/uploads/1/3/0/8/130874139/xewebines.pdfIn PDF document text
    • http://luvgnv.com/uploads/1/3/1/4/131483153/94b042b8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://woniwefis.files.wordpress.com/2020/06/benononifimowiresunat.pdfIn PDF document text
    • https://zasolifi.files.wordpress.com/2020/06/wafujitabibavijelutojafa.pdfIn PDF document text
    • https://jarojadum.files.wordpress.com/2020/06/32702235303.pdfIn PDF document text
    • https://ribekewozepu.files.wordpress.com/2020/06/vatuvekekaxan.pdfIn PDF document text
    • https://zazigizer.files.wordpress.com/2020/06/fovudukujoruteki.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 10520 bytes
SHA-256: 281d44b4edea1a711d1e4c06122939e84e9a1fa9b515bb7b450cb66f751bc479
font_01_sfnt_off00008a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A08 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

Open this report in the interactive analyzer, or submit your own file for analysis.