Malicious PDF — malware analysis report

Static analysis result for SHA-256 455ff0654037cb85…

MALICIOUS

PDF

37.4 KB Created: 2020-04-06 11:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2399241bedab3ad648057c7086ce8f40 SHA-1: c48076e359a567c8fc52e9c798a1d856265e1ee3 SHA-256: 455ff0654037cb85942d900d86d87e85fe75b4801db3171764a31e8a18559237
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, includes a URL that points to a Spanish phrase related to prayer for a prisoner, suggesting a social engineering lure. The primary attack pattern involves directing users to a network of potentially malicious websites hosted on various domains, likely for SEO spam or to serve further malicious content. 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://dominionchapellosangeles.com/uploads/1/3/0/6/130621071/130621071.html#oracion+al+justo+juez+para+sacar+un+preso
    • http://loletahsvipsalon.com/uploads/1/3/1/3/131380045/mesegugego_gados_mitikotosuviba.pdf
    • http://aascapedesign.com/uploads/1/3/0/5/130588720/f2f6f806aff.pdf
    • http://dmrackley.com/uploads/1/3/0/4/130488750/nogis_wunodix.pdf
    • http://ajconsultinggroupllc.com/uploads/1/3/0/8/130813413/rabol.pdf
    • http://fullflow.plumbing/uploads/1/3/1/3/131383480/cedbe696ed2.pdf
    • http://bin46restaurant.com/uploads/1/3/0/5/130552106/7401880.pdf
    • http://powernetgainesville.com/uploads/1/3/1/0/131070733/zuvabafudewoluw_lepulozogubew_votudewepojima.pdf
    • http://pravarana.com/uploads/1/3/1/4/131407315/nogagewevux_tenazitewi_bulabudu.pdf
    • http://irepit.com/uploads/1/3/0/4/130436399/tifimibetukifiviv.pdf
    • http://barkproper.com/uploads/1/3/0/7/130739020/viturifi.pdf
    • http://divorce-rebuild.com/uploads/1/3/0/6/130621952/3468ddccb5.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_off00006a6a.bin
7388b38618cae849213c1366d600505bf620f0749389afbac231ce107d6f267e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6A 8268 bytes

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