Malicious PDF — malware analysis report

Static analysis result for SHA-256 048a144c6ea8acd1…

MALICIOUS

PDF

30.8 KB Created: 2020-04-09 16:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0cde10d6787617b76a45b003a2c5a80c SHA-1: da23a87599b6f812834fcf8a7977909e3dffe0c3 SHA-256: 048a144c6ea8acd1038ee53b89fe6a9eaebd8224777d4406704cef92edd9d66f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to other PDF files. This pattern is indicative of a link farm or a method to distribute malicious content through seemingly innocuous documents. The ML classifier strongly supports the malicious verdict, and the presence of numerous suspicious URLs reinforces this assessment.

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://inwardvision.com/uploads/1/3/0/6/130620492/130620492.html#vmware+esxi+6.+5+iso
    • http://3333nfranklin.com/uploads/1/3/0/8/130813904/bofapoto-xikivezi.pdf
    • http://salidafireextinguisher.com/uploads/1/3/0/7/130740257/juzosuvigukaxat.pdf
    • http://wages2profit.com/uploads/1/3/0/6/130604114/264dced3bec.pdf
    • http://360degree.solutions/uploads/1/3/0/2/130289377/kedanitanetexeb.pdf
    • http://sweetnsimpleboutique.com/uploads/1/3/0/3/130379110/52bad223.pdf
    • http://furrowsaliteraryjournal.com/uploads/1/3/0/6/130620756/garobi.pdf
    • http://balearicluxuryestates.com/uploads/1/3/0/6/130603942/jiterolatexunizajo.pdf
    • http://automotoreslaplata.com/uploads/1/3/1/1/131164257/7d3905600f.pdf
    • http://photosbymarushka.com/uploads/1/3/0/7/130775277/momovun_batotudugafako.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_off0000526d.bin
82f45ee14140cfc69abf7c0b02a19e091e38c19250ebe27387f17fb63e8281c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526D 7220 bytes

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