Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3c53c1029c1888…

MALICIOUS

PDF

41.7 KB Created: 2020-11-06 18:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 194c5ab8a3dc28dedf046989157d0c62 SHA-1: ddd17e58174afa0b232efd758f11d39a54dabef0 SHA-256: 0e3c53c1029c18884447c7253131b9e64bc1da66fd5aa394390cdc8ef59d1ead
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://traffking.ru/aws?keyword=eagle+scout+letter+of+ambition+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385030/normal_5f9ab4faae7c6.pdfIn PDF document text
    • https://bazanepuxakelu.weebly.com/uploads/1/3/4/3/134346533/rusotugufuri.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/6774791.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/dd82abe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5fa54f6f54bfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8744fd5e33c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5f9175f9f1253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f93f182ad665.pdfIn PDF document text
    • https://gugukufetufa.weebly.com/uploads/1/3/4/3/134337187/dorewedifebeme_xogevo.pdfIn PDF document text
    • https://xigijoxupawise.weebly.com/uploads/1/3/3/9/133999412/5031169.pdfIn PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/20ffad82bad.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/xobuwup.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/pekanapilosaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zonebon/domain_model_class_diagram_legend.pdfIn PDF document text
    • https://jevuvibojaz.files.wordpress.com/2020/11/battersea_park_map.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/97438611478.pdfIn PDF document text
    • https://gibalon.files.wordpress.com/2020/11/lofejifif.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 5432 bytes
SHA-256: bce7c7de8f71154f58bcc2194e3cefa4c30032ed932559a0e11ed9cc44fbd6f4
font_01_sfnt_off00007651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7651 10412 bytes
SHA-256: 76f433585a6a78ba415636b8a8ff558f4163903cd39ee2466176f2b0667f7fe4