Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ef53d16ad3e0ff…

MALICIOUS

PDF

32.9 KB Created: 2020-05-30 05:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 8cdd05602ef3d93c969170bc60709608 SHA-1: 06aa99d55232dbe97e2d7e43a6038372a2cf164c SHA-256: d1ef53d16ad3e0ff20ae48cecee33e953715d28a12df7137ff931827cf60fe69
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text and references to 'Midsomer murders', which may be a lure. No scripts were extracted from this sample. The primary malicious activity appears to be directing users to a network of potentially malicious or SEO-manipulated websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://theartofawe.org/uploads/1/3/1/8/131856860/131856860.html#midsomer+murders+a+tale+of+two+hamle PDF link annotation
    • http://squawque.co.uk/uploads/1/3/1/4/131407035/jibepibuguru_xolazolelufun_xogareberoxonax.pdfIn PDF document text
    • http://dorothynellcraft.net/uploads/1/3/1/1/131164032/4631af58c.pdfIn PDF document text
    • http://463.undesirable.us/uploads/1/3/0/5/130550772/b810748.pdfIn PDF document text
    • http://naturalacumen.com/uploads/1/3/1/4/131452839/faf3d0ada4f982a.pdfIn PDF document text
    • http://blueoceanconsulting.xyz/uploads/1/3/0/6/130621691/salinelepulutid-vevafesax.pdfIn PDF document text
    • http://hippieretreat.com/uploads/1/3/0/7/130775162/f3b99b1.pdfIn PDF document text
    • http://lkgqoqw.sites.logojoy.com/uploads/1/3/0/6/130604922/26c5c67b8f1b003.pdfIn PDF document text
    • http://asteadyhappiness.com/uploads/1/3/0/7/130776446/moduduwavo-siwinanaveropu-batizawupeminip.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B9 10192 bytes
SHA-256: aa85d0fccac58e5cd114ea7ebcbcff47d4d5e6ce704c74b86ad94ba6963c1df7