Malicious PDF — malware analysis report

Static analysis result for SHA-256 569f1846c9291b5f…

MALICIOUS

PDF

44.7 KB Created: 2020-04-22 22:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: da5f884eb5a53eac1982459dcef8996d SHA-1: 26f43149a6c1c6f9366c2e2254da9d47f7ecfb34 SHA-256: 569f1846c9291b5fb9b227d1d5b972b2ef2196eaefd19cdc37db78ed89703d5b
94 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, many of which point to other PDF files hosted on similar domains. This behavior is indicative of a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious. The primary URL points to a document that appears to be a manual for a Chevrolet Spark, likely a lure to encourage clicks.

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://kyflowernseed.com/uploads/1/3/0/6/130639812/130639812.html#manual+chevrolet+spark+ng+2017
    • http://patrick-mcwhorter.com/uploads/1/3/0/6/130620609/kawagefugikid.pdf
    • http://chillnbeans.com/uploads/1/3/0/7/130775047/zirev_biralot_pixonumifibok.pdf
    • http://kevinbanks.photography/uploads/1/3/0/7/130740497/7264517ab1c7.pdf
    • http://christopherreber.com/uploads/1/3/1/4/131413550/penogab-dipimawumezelij-nuxun.pdf
    • http://jmkjanitorialservices.com/uploads/1/3/1/4/131483110/f197c5b24b.pdf
    • http://1happybike.com/uploads/1/3/1/4/131405934/zifematewuvivigova.pdf
    • http://weboffering.net/uploads/1/3/0/4/130435771/fawux.pdf
    • http://ivoryoung.com/uploads/1/3/1/3/131379873/venujegera_fugefatevixupi.pdf
    • http://shiftmanagementconsulting.com/uploads/1/3/0/6/130639423/wekupoxu.pdf
    • http://cmbbooks.com/uploads/1/3/1/4/131407815/leleduponibepe-musatirukowi.pdf
    • http://lrservizi.net/uploads/1/3/0/5/130542727/3e2b03.pdf
    • http://baprints.net/uploads/1/3/1/4/131406448/0185fcd.pdf
    • http://eerieandodd.com/uploads/1/3/1/1/131163960/bbcc841d.pdf
    • http://dewumine.com/uploads/1/3/1/4/131406438/d08f67c20.pdf
    • http://longviewindustries.net/uploads/1/3/0/6/130620948/8223023.pdf
    • http://jmkjanitorial
    • 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_off0000858b.bin
961ee594f97f7c9157b99dff8622ec630124419fabad6953defa65c629faf7d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858B 9220 bytes

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