Malicious PDF — malware analysis report

Static analysis result for SHA-256 686d224fb234f926…

MALICIOUS

PDF

40.8 KB Created: 2020-03-26 05:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e6d3be49692570ac21113a9c7afd8b45 SHA-1: 6e578ef2ec57cde9af9e589dd50bfab62ff6b950 SHA-256: 686d224fb234f9263c7a10546f38498a22bf9d8bc52030756d017d4168ce3dac
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent. The embedded URLs are likely used to host further stages of an attack or phishing 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://smbrandmgt.com/uploads/1/3/0/4/130491322/130491322.html#determinacion+de+tasa+minima+aceptable+de+rendimiento+ejemplo
    • http://assric.org/uploads/1/3/0/5/130550834/relanomez.pdf
    • http://csobecancour-en.com/uploads/1/3/0/4/130478772/gegurararawut-zopudumesuma-wibiva-bezefevafimosor.pdf
    • http://stuijvesant.ch/uploads/1/3/1/3/131379732/tivenefewodun.pdf
    • http://micheleblancpain.com/uploads/1/3/0/6/130639212/4829511.pdf
    • http://cwebphoto.com/uploads/1/3/0/9/130969565/tudewuvu.pdf
    • http://bamboohealthsocks.com/uploads/1/3/0/4/130476605/lodajajomaz-nogulodikutexo.pdf
    • http://360warriors.com/uploads/1/3/0/7/130776296/narode.pdf
    • http://thesussexcollection.com/uploads/1/3/0/4/130483277/xigerid.pdf
    • http://frankwestproject.com/uploads/1/3/0/7/130776401/ronuz.pdf
    • http://mahoneyartparadise.com/uploads/1/3/0/7/130739537/xexufaxivegaz.pdf
    • http://tinybubbleslovablesoaps.com/uploads/1/3/0/3/130323811/xokigefar.pdf
    • http://dropthemicagency.com/uploads/1/3/0/9/130969526/gifirutojegeku.pdf
    • http://ktoml.com/uploads/1/3/0/5/130540458/2115279.pdf
    • http://infcr.com/uploads/1/3/0/3/130323520/1596102.pdf
    • http://ns.centennialtimberframes.com/uploads/1/3/0/2/130273884/9d1eea7c82a7775.pdf
    • http://southerntrendslandscaping.com/uploads/1/3/0/4/130436236/bepigakeraxejebav.pdf
    • http://theroom.club/uploads/1/3/0/4/130488970/ribavakut.pdf
    • http://www.onesourcebaltimore.com/uploads/1/3/0/2/130271132/6d14bedaa.pdf
    • http://twdental.pl/uploads/1/3/0/5/130543170/2906738.pdf
    • http://newenglandmarineelectric.com/uploads/1/3/0/4/130476516/28a9f.pdf
    • http://actforwardengraving.com/uploads/1/3/0/5/130545382/xebejazigef.pdf
    • http://innovagreenway.proposals.jll.com/uploads/1/3/0/3/130379415/pitotitifene.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_off0000729c.bin
756c544f90da9d4c1e8ae16f79f3660f0faf24520b16166c27b5ca5c79a9ec35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729C 9668 bytes

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