Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e15d5adf32a0976…

MALICIOUS

PDF

47.9 KB Created: 2020-04-01 12:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b0e5de0979bf27995364a0bc60c13613 SHA-1: 39fd2b7ab2b3e4721fcc54b7ced9416fc1eea57b SHA-256: 6e15d5adf32a0976aa8040a816c8f373250122d04a30104339b78ff132671488
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL points to an HTML page, while many others point to PDF files, suggesting a link-farming or content distribution scheme. No scripts were extracted, but the presence of numerous external links indicates a potential for distributing malicious payloads or engaging in SEO abuse. The ML classifier strongly supports the malicious verdict.

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://marmarworld.com/uploads/1/3/0/4/130476586/130476586.html#confess+colleen+hoover+tv+series
    • http://districtmatl.com/uploads/1/3/1/1/131164171/6029379.pdf
    • http://howwilltheyhear.org/uploads/1/3/0/8/130814516/b97a249addd.pdf
    • http://womeninsiderevolution.com/uploads/1/3/0/6/130605504/8700042.pdf
    • http://adriana-bachmann.com/uploads/1/3/0/4/130476611/f169459e645fb7f.pdf
    • http://thoserascalfeelings.info/uploads/1/3/0/5/130590047/joruzujivumugid-kevano-gotuzemekad-puwapalise.pdf
    • http://noahco301cportfolio.com/uploads/1/3/0/7/130739616/8631042.pdf
    • http://startrekuncharted.com/uploads/1/3/0/7/130776083/b89ed0c.pdf
    • http://soundwavesnb.com/uploads/1/3/0/8/130874063/lenigotopivegiw.pdf
    • http://biscuiterie-maestracci.com/uploads/1/3/0/6/130604473/sigamomemefa.pdf
    • http://theadamsstore.com/uploads/1/3/0/6/130639160/lowebuvirurejun_rarusasoteb_jepel.pdf
    • http://strozzistawzeeh.com/uploads/1/3/0/3/130379379/gudofajelozilox.pdf
    • http://uminnesotamap.com/uploads/1/3/0/4/130489350/xuredisejopakimivu.pdf
    • http://holycrossalumni.com/uploads/1/3/0/4/130491752/c3aa6c2b936f3f.pdf
    • http://jamieballerini.com/uploads/1/3/0/7/130775251/7165525.pdf
    • http://jeffreynowlinscultpure.us/uploads/1/3/0/2/130272648/fibojafibasobetev.pdf
    • http://elcorralrestauranton66.com/uploads/1/3/0/6/130639471/dukewubejifud.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007764.bin
c219929b96cb83aaea77a22d50e8dabf3bc73b2e21c5b793a9785932e9ead492
pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 10124 bytes
font_01_sfnt_off00009aa4.bin
1d1fa5121415f8f5353993473374918b9d2a38f433752094af4cce5d3be72c8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA4 16312 bytes