Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a65975ea800511…

MALICIOUS

PDF

40.4 KB Created: 2020-04-06 07:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 43b2c7e4166f484f99b1f90f14366016 SHA-1: d097a7a5caa7ca78be8f38a52a822d4fbb6d048e SHA-256: d4a65975ea80051173785a7d29fc9b6a3689080295b0a81efc918f13fe431362
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links to various domains, a technique often used for SEO spam or to host phishing content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this pattern. The document body contains garbled text but also includes the URL 'http://battleaxstrategies.com/uploads/1/3/0/7/130739508/130739508.html#rcp+basico+guia+2017', which is also listed among the extracted URLs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://battleaxstrategies.com/uploads/1/3/0/7/130739508/130739508.html#rcp+basico+guia+2017 PDF link annotation
    • http://projectbluehunt.com/uploads/1/3/1/4/131411197/2619249.pdfIn PDF document text
    • http://harvardiranianweekend.com/uploads/1/3/0/7/130739742/nofuzolise.pdfIn PDF document text
    • http://volantrrm.com/uploads/1/3/1/3/131382495/tefir.pdfIn PDF document text
    • http://thefairbankagency.com/uploads/1/3/0/4/130435649/652609c09f4d4.pdfIn PDF document text
    • http://journeybacktochristendom.com/uploads/1/3/0/6/130603997/kemijefis.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 8088 bytes
SHA-256: 079ea58d73b522a1009e42937a29ad278785f0bb19aff76d93bb622129a507a4
font_01_sfnt_off00007fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC8 16184 bytes
SHA-256: 98eae9b279df2ce680d70a4d505064ea756df0c3cbb9cd39c5dd401b12048d18

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