Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef443ac177b3066…

MALICIOUS

PDF

79.8 KB Created: 2021-03-17 23:20:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae99e99e963c8de2017c3f079fab3ffb SHA-1: 24339a9dc3be1843f7dea80f3251330d1167e00f SHA-256: eef443ac177b3066f08a538a149d6c568c666de96927fce64ea3a49c4498eefb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://xezojetit.ru/123?utm_term=adonis+golden+ratio+training+program+free', suggests a potential phishing or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://xezojetit.ru/123?utm_term=adonis+golden+ratio+training+program+free
    • https://dixapixukezawe.weebly.com/uploads/1/3/5/3/135388261/wajaf_lofegexuzofeb.pdf
    • https://cdn-cms.f-static.net/uploads/4474465/normal_604190342d4ff.pdf
    • https://navowilupaxit.weebly.com/uploads/1/3/1/3/131381067/2f69442e30.pdf
    • https://cdn-cms.f-static.net/uploads/4446273/normal_60172e870e84f.pdf
    • http://fuwiduwoxobol.mygamesonline.org/bhagavad_gita_in_marathi.pdf
    • https://gekiwudev.weebly.com/uploads/1/3/4/7/134769606/1118866.pdf
    • https://witetalujoloxof.weebly.com/uploads/1/3/0/7/130740434/tagakori_sudogutogugar.pdf
    • https://cdn-cms.f-static.net/uploads/4392867/normal_5fda3ee49c089.pdf
    • https://cdn-cms.f-static.net/uploads/4446942/normal_600e6d6562a72.pdf
    • https://cdn-cms.f-static.net/uploads/4471106/normal_602ce2bb5479c.pdf
    • https://cdn-cms.f-static.net/uploads/4390681/normal_600bb7bb61c09.pdf
    • https://static.s123-cdn-static.com/uploads/4464539/normal_5ff091ba03de8.pdf
    • https://cdn-cms.f-static.net/uploads/4380229/normal_6050e6ed499a5.pdf
    • https://sobopagep.weebly.com/uploads/1/3/0/8/130873740/3325928.pdf
    • https://cdn-cms.f-static.net/uploads/4446770/normal_60342ec7f33ea.pdf
    • https://ruzunaxatan.weebly.com/uploads/1/3/4/3/134340268/e85d539.pdf
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/a17fe.pdf
    • https://static.s123-cdn-static.com/uploads/4451753/normal_5fe1b46a751e2.pdf
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/d1f8c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gaxilitexu.onlinewebshop.net/all_souls_cemetery_long_beach_ca_staff.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07d.bin
93ce06be667d93978ba5f316fc5776e1661ed60e5cb50800f5789aa283e01114		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 5348 bytes
font_01_sfnt_off0001028e.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1028E 1800 bytes
font_02_sfnt_off00010b1c.bin
1287a7595fe70d4772f64c487ffe70b829e436680afccf9e99c56cd7eadab6a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 11040 bytes

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