Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81b98a2112b56d3…

MALICIOUS

PDF

38.8 KB Created: 2020-05-19 08:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 87d68c1d67afa604bf6d7f8bb25d7c0a SHA-1: da9d539d4bed8f970a4c2a0062a411140b732a49 SHA-256: e81b98a2112b56d3711cfbd562b6de3735343c784a16123b65106333587397f7
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 link farming or to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior. The document body contains text related to a meal planner coupon, which serves as a lure. The embedded URLs are likely used to distribute further stages of an attack or to host phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://limosinkingwood.com/uploads/1/3/0/6/130604949/130604949.html#forks+over+knives+meal+planner+coupo PDF link annotation
    • http://explorgraphy.com/uploads/1/3/1/4/131438113/wapufupeb.pdfIn PDF document text
    • http://peragastronomie.com/uploads/1/3/1/8/131856124/supubuxedo_pabaru.pdfIn PDF document text
    • http://letzdizcuss.com/uploads/1/3/1/8/131856177/7153636.pdfIn PDF document text
    • http://fairfieldhomeinspection.net/uploads/1/3/0/4/130483253/futasaneva.pdfIn PDF document text
    • http://jonathanhuffman.me/uploads/1/3/1/4/131438474/9602838.pdfIn PDF document text
    • http://manifestgang.shop/uploads/1/3/1/1/131163996/3425481.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6D 11164 bytes
SHA-256: ba42886fc5c27b0f63fb1c87abccd1179a4ba4847a8b6e73720aa02e309f2569

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