Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3d6eec256e634d…

MALICIOUS

PDF

38.0 KB Created: 2020-05-31 13:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad8e5375c05825e1ef6a6a9cd9696744 SHA-1: 235fef786fc432918a607a1479fffb5eac935226 SHA-256: 0e3d6eec256e634d3f6625ac1b9ec349b8567ebbcdcdf5572e3b9e64828bb912
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 by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful content or phishing sites. While no scripts were explicitly extracted, the structure and heuristics point towards a malicious document designed to leverage external resources.

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://pranzotruck.com/uploads/1/3/1/3/131379325/131379325.html#varaka+bin+nevfel+ger%25C3%25A7ekleri
    • http://psychologynikkigrant.com/uploads/1/3/0/6/130604744/vafowigopoza.pdf
    • http://havengaming.org/uploads/1/3/0/6/130621108/6383214.pdf
    • http://longfordtidytowns.com/uploads/1/3/1/4/131407165/7b8bb8df8d6f.pdf
    • http://finnovance.com/uploads/1/3/1/1/131163908/8675690.pdf
    • http://newleafereit.com/uploads/1/3/0/6/130620290/tapazogun.pdf
    • http://sanspointe.com/uploads/1/3/0/6/130605332/2657205.pdf
    • http://jbgty.org/uploads/1/3/0/5/130540010/gemex.pdf
    • http://ipoggioli.com/uploads/1/3/0/5/130589385/kuzametax.pdf
    • http://charlesaheiner.com/uploads/1/3/0/4/130436137/xisafigejo-pukigoninal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://tufugexa.files.wordpress.com/2020/05/39522247538.pdf
    • https://zopowozofoje.files.wordpress.com/2020/05/letuloti.pdf
    • https://zodizijemas.files.wordpress.com/2020/05/14149059766.pdf
    • https://sejaren.files.wordpress.com/2020/05/zawedu.pdf
    • https://suxeniruwip.files.wordpress.com/2020/05/muberupadizusali.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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061ea.bin
ba1c9a094e0d16b8e55669cbcafbf767eee5c2fcc3ef36c0fa707f69e8f879d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EA 13240 bytes

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