Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf32d7d43f136ca…

MALICIOUS

PDF

70.6 KB Created: 2021-01-30 02:21:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c70ad5c5aac7e299278d0d3662cb0d50 SHA-1: c6c050399422f798b4c0064c4585f3c39c4e0a8e SHA-256: ebf32d7d43f136cad2a3e2b0055d8471369e4065207352d3dce1d74a0d33fd8c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, suggests a lure related to 'Sea fishing hook size chart'. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/wb?keyword=sea%20fishing%20hook%20size%20chart PDF link annotation
    • https://gexipatar.weebly.com/uploads/1/3/1/6/131606255/bovunabigabul.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/bogururobag_juvibat_jidoguf_rogananoso.pdfIn PDF document text
    • https://fanakigefepawaf.weebly.com/uploads/1/3/0/8/130873796/bexilerawiva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483839/normal_5fe40c6321fb0.pdfIn PDF document text
    • http://funiwigurogamu.iblogger.org/potty_training_in_3_days_guide.pdfIn PDF document text
    • https://xoberaditide.weebly.com/uploads/1/3/4/6/134645794/nazelumitovife_napif_susixiran.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459477/normal_5fe1a848021c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403684/normal_5fcd04bcc457c.pdfIn PDF document text
    • https://tojemiwavujiguv.weebly.com/uploads/1/3/4/4/134468879/nikef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_5fd28c50a7744.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/voxipanovigepiv/binomische_formel_bung.pdfIn PDF document text
    • http://vakutasuv.epizy.com/free_brochure_template_online.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/the_best_free_compass_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/12651131105.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/mepofigemenokesexorum.pdfIn PDF document text
    • http://xatofobimuxu.rf.gd/sogevi.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/animal._crossing_new_leaf_art_guide.pdfIn PDF document text
    • http://jifigazanovew.epizy.com/lofonudo.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/28849189972.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_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 5328 bytes
SHA-256: fa9fb96a94e873faeb226d9212f363c85d236da7e925d3eee58f7d05d4a1ab98
font_01_sfnt_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 10244 bytes
SHA-256: a0543a624c1862536db2da05153d2062cfd543dc32ff042498860f00f6e61eb7

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