Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7618243ed947202…

MALICIOUS

PDF

37.7 KB Created: 2020-06-18 09:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 6cb49729852a0efd9e2ed3d2ec880cba SHA-1: 4b5965a0f60a1c6c23f42fe7fa4230b2503a4c43 SHA-256: c7618243ed947202a7a09bd68bf116975e889ce4f027506c2fc3fd5382cd0463
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution network. The embedded document body text, though partially corrupted, contains a URL that is also present in the list of extracted URLs. No scripts were extracted from this sample. The primary attack pattern appears to be directing users to a network of potentially malicious or SEO-manipulated content.

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://trikon-group.devsite-1.com/uploads/1/3/0/8/130814676/130814676.html#i+love+you+bodyguard+guitar+lesson PDF link annotation
    • http://cpcontacts.diotechdata.com/uploads/1/3/0/8/130815059/5e398d1aae94f.pdfIn PDF document text
    • http://mollyparizeau.com/uploads/1/3/0/9/130969760/5018733.pdfIn PDF document text
    • http://allanhovi.com/uploads/1/3/0/5/130551264/3724108.pdfIn PDF document text
    • http://decoradesignstudio.com/uploads/1/3/0/8/130873786/2037459.pdfIn PDF document text
    • http://lepinbuildingblocksau.com/uploads/1/3/0/6/130620168/ganenunakekit.pdfIn PDF document text
    • http://noreply-27.info/uploads/1/3/0/5/130541462/jinivafane.pdfIn PDF document text
    • http://midwestundergroundinc.com/uploads/1/3/0/2/130289291/padaf.pdfIn PDF document text
    • http://komercallc.net/uploads/1/3/0/7/130776754/sesise-lowakijo-magoxawobef-tetujo.pdfIn PDF document text
    • http://webmail.winwithwill.com/uploads/1/3/0/8/130814219/dewegewadosa-bitiwixasetexak-laliti-zubub.pdfIn PDF document text
    • http://rosecityinspections.com/uploads/1/3/0/3/130323811/besenogozifazaxezoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5536 5116 bytes
SHA-256: e65b268bd848b5c84e131d0f803121ea862a652eaaa08376cb986bf74b03a7fe
font_01_sfnt_off000066a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A7 10036 bytes
SHA-256: 93db382e2f862cc5706f58537954fad102c0d79c985b98e0181b42f5741959e2