Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e869b5b13cf932d…

MALICIOUS

PDF

40.0 KB Created: 2020-11-05 17:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 126a5a2b1395db24e11ad5cd34eedfb4 SHA-1: d256a1ea06d9831c20e1828ae141208ccdf09c3c SHA-256: 2e869b5b13cf932dc09982cc6743554b247db595d04a3a1e35b588cf99a14c8f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 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 https://traffnew.ru/123?keyword=alliance+crusader+loadout PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5fa01a373ca21.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/9595517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410976/normal_5f9c2ec2296c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_5f979d151ff7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_5fa21ebc06891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5f9420dd0c292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f8cc041eaae6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/possessive_adjectives_and_pronouns.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/netizens_in_cyberspace_active_citizenship.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/wopulal.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/tratamento_retinopatia_hipertensiva.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/62412049191.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/70339786647.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_off00005f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F01 4924 bytes
SHA-256: 98a7373cca35b5cdf9da47d70daf77981ae7659020ca6373874d3346a49ec35b
font_01_sfnt_off00006fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC9 10368 bytes
SHA-256: 042d86e9846ae10e00d3f3d2762d588801316a1f72ccb10de771d74eadc48424

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