Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1c92945c3c6415…

MALICIOUS

PDF

39.6 KB Created: 2020-03-22 12:16:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fdba966bae462bcf8299d9fd366b6d38 SHA-1: 2577865fe532b522a81e3cccad2dae83b508bfc4 SHA-256: 9a1c92945c3c64152140c2af5cd25be0bdd83c55877ca15083047b2d3b98748e
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or to direct users to malicious websites. The ML classifier strongly indicated maliciousness. The document body text, while partially garbled, includes the same URLs found in the heuristics, reinforcing the link-farming attack pattern. No scripts were extracted from this sample.

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://peaceofmindtravelbags.net/uploads/1/3/1/1/131163615/131163615.html#como+se+clasifican+las+rocas+metamorficas+segun+su+textura
    • http://pouletxpress.com/uploads/1/3/0/5/130540405/bujejepubi.pdf
    • http://mx.midwestschoolofastrology.com/uploads/1/3/0/9/130969631/pewukefekilo.pdf
    • http://camargoscar.com/uploads/1/3/0/6/130621278/nonixojufozeku-tatijelikuliz-dujewiz-tamudalikix.pdf
    • http://www.believezevenbergen.com/uploads/1/3/0/8/130814297/0130dc97902460.pdf
    • http://journeytosimplicity.org/uploads/1/3/0/4/130435929/9679479.pdf
    • http://remixprojects.com/uploads/1/3/0/8/130813100/bujop.pdf
    • http://www.prasherworld.com/uploads/1/3/0/5/130590666/6618854.pdf
    • http://pacificfruitandveg.com/uploads/1/3/0/4/130476423/dupin.pdf
    • http://happylifeplanners.com/uploads/1/3/0/3/130313000/5832702.pdf
    • http://codemanllc.net/uploads/1/3/0/8/130874001/9dc25.pdf
    • http://malachany.net/uploads/1/3/0/6/130604495/583e27.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_off00006f69.bin
5553c6a955ea49dc62a7d080f620d3876fde06c56b80635fb4e4386c337bf371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F69 8700 bytes

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