Malicious PDF — malware analysis report

Static analysis result for SHA-256 33018a559da52a39…

MALICIOUS

PDF

73.8 KB Created: 2021-06-06 13:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbcd5b22147cc75433de75dd7609e83a SHA-1: 79039de1364ef07072e9b0e57a75753b154a8f5a SHA-256: 33018a559da52a391acb3745b0bcfb9e5b571c6bbd84dc81eadb49ffd049a425
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a domain associated with phishing. The document body, though heavily obfuscated, appears to be a lure related to sports regulations, likely intended to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/pbw?utm_term=medidas+reglamentarias+de+cancha+de+voleibol+de+playa
    • https://static.s123-cdn-static.com/uploads/4377114/normal_5fe1fac0e910e.pdf
    • https://cdn-cms.f-static.net/uploads/4489717/normal_604981288b6cd.pdf
    • https://static.s123-cdn-static.com/uploads/4460060/normal_5fe59670d6218.pdf
    • https://cdn-cms.f-static.net/uploads/4477620/normal_604cdb33e402e.pdf
    • https://static.s123-cdn-static.com/uploads/4481052/normal_5ffe12422db43.pdf
    • https://static.s123-cdn-static.com/uploads/4478947/normal_600182db3e87e.pdf
    • https://cdn-cms.f-static.net/uploads/4482230/normal_603c343f5437a.pdf
    • https://cdn-cms.f-static.net/uploads/4500447/normal_5fd1fcb099116.pdf
    • https://cdn-cms.f-static.net/uploads/4367287/normal_60433b22403ff.pdf
    • https://cdn-cms.f-static.net/uploads/4460972/normal_60b9a14dc1f79.pdf
    • https://static.s123-cdn-static.com/uploads/4470980/normal_5feeebe026b21.pdf
    • https://cdn-cms.f-static.net/uploads/4375344/normal_604aecf33824b.pdf
    • https://cdn-cms.f-static.net/uploads/4478132/normal_6028ab9dd6c39.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://genarozep.pbworks.com/f/bigebase.pdf
    • https://uploads.strikinglycdn.com/files/0e0a36a1-61d9-40a7-a25c-d26113518a51/barnett_wildcat_c5_parts_list.pdf
    • http://zolunegoli.pbworks.com/w/file/fetch/144560073/cmr_national_public_school_bangalore_fee_structure.pdf
    • https://uploads.strikinglycdn.com/files/f3f0325b-c3e2-49d7-9a64-4d77333c3516/the_organic_chemistry_of_drug_design_and_drug_action_by_richard_silverman.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de9c.bin
71d51b9d3133d396a157696718c114f88b2e8216d055095a46b094ba6cc58325
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9C 5792 bytes
font_01_sfnt_off0000f243.bin
45e14e536d402ca231a1f392733dee5ebd2e756c42c7bcb12d0b3c5a97cd3289
pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 11564 bytes