Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2cf8c58644b0da…

MALICIOUS

PDF

80.0 KB Created: 2021-05-12 14:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 306e4ae4fb56dcca5b0b25ed02d25200 SHA-1: 20b83bd9c69b6e4f796b885c9b0dcf8865fe6148 SHA-256: 3c2cf8c58644b0da63ba4a9da931d158155d650793316a69fb333a9a1a67eddb
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The presence of a 'utm_term' parameter in one of the URLs suggests an attempt to track user engagement with potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/strik?utm_term=death+note+light+and+misa+relationship PDF link annotation
    • https://vufuvato.weebly.com/uploads/1/3/4/7/134718288/1f7e444950e0.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/7ce7ba0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413112/normal_5ffa6b216596e.pdfIn PDF document text
    • http://katermore.ru/95465692717lg4db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480736/normal_60555dfc89704.pdfIn PDF document text
    • http://raisinsapp.pro/dosujisagugurisiitf7h.pdfIn PDF document text
    • https://giwelexe.weebly.com/uploads/1/3/0/8/130814055/f5bb809b9847ebc.pdfIn PDF document text
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/5153121.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420586/normal_6004d96c2c77a.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/92be1ecb579ec.pdfIn PDF document text
    • https://sukanoxe.weebly.com/uploads/1/3/1/4/131453950/siboji.pdfIn PDF document text
    • https://vavulawukuret.weebly.com/uploads/1/3/4/6/134690424/faf8e8f.pdfIn PDF document text
    • https://lezisonesu.weebly.com/uploads/1/3/5/3/135339892/7090414.pdfIn PDF document text
    • http://vittorguxx.site/can_you_weld_aluminum_with_hobart_140k6tgv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450719/normal_60474a6b0eb75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478146/normal_5fceae5dad14c.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/7acb829cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_6049465b437b0.pdfIn PDF document text
    • https://bazifimu.weebly.com/uploads/1/3/4/6/134661545/8597698.pdfIn PDF document text
    • https://nikonewakudofu.weebly.com/uploads/1/3/2/3/132303001/lesasuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_60125897c138a.pdfIn PDF document text
    • https://rigopodi.weebly.com/uploads/1/3/4/3/134307943/7752706.pdfIn PDF document text
    • https://sigajijatikad.weebly.com/uploads/1/3/1/3/131379485/6cbde41c46a9.pdfIn PDF document text
    • http://health2health.online/682407437099o56y.pdfIn PDF document text
    • http://detonic-hypertonie.website/do_breathing_techniques_workdltmy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF06 5160 bytes
SHA-256: 79ab38814f8b9b79c50fd755b6f87e6cb6155748f7731c1c1af1651397f0eaa9
font_01_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 10540 bytes
SHA-256: 6ba55743d49b6c0fbceffbeeaef63df0818444a114ac786c67fa54ac8223c0b6
font_02_sfnt_off00012452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12452 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333