Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08094ae67803bea…

MALICIOUS

PDF

69.2 KB Created: 2021-03-19 18:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2beec4e2faf8e92f1a6745fee87ed152 SHA-1: 818ba4d6970283ba1c9f9b445897fef721049849 SHA-256: f08094ae67803beabd2d06da989ec3c139a278a737f2675132174ec1aca69532
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9996

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://jacksth.ru/strik?utm_term=blue+point+eecr1a PDF link annotation
    • http://my-favshopg.online/how_to_plan_your_life_with_adhdztrml.pdfIn PDF document text
    • https://mitadelo.weebly.com/uploads/1/3/4/7/134712934/4323407.pdfIn PDF document text
    • http://thefortykuti.com/jamexalukojimuvezixokobitek13v.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/693754.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/jiwiruri.pdfIn PDF document text
    • http://umdtheatre.ru/41385386069td2ko.pdfIn PDF document text
    • https://takesefitetipal.weebly.com/uploads/1/3/2/6/132682925/7912553.pdfIn PDF document text
    • http://idealica-italiaoficial.site/2015_honda_pilot_repair_manualmax1n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457854/normal_5ff3170e26c2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445557/normal_6048e01e53920.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476302/normal_5fe2146651d6a.pdfIn PDF document text
    • https://pejejejepo.weebly.com/uploads/1/3/2/6/132682076/05dbc68d71097c.pdfIn PDF document text
    • http://summer-italy.fun/20807735646wy9u6.pdfIn PDF document text
    • https://rixajijinuroje.weebly.com/uploads/1/3/4/4/134473879/pimez_sinoxolerot_sidew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_60360cf847bfb.pdfIn PDF document text
    • https://wutomafokusax.weebly.com/uploads/1/3/5/3/135314756/nuxesekijetibesuwet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393916/normal_5fdff345f4234.pdfIn PDF document text
    • https://lojefumelo.weebly.com/uploads/1/3/0/8/130814401/ninidezekoxeneniximu.pdfIn PDF document text
    • http://sodaapp.club/la_biblia_hablada_hebreos_10xa2br.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vanakodezifezuv.epizy.com/kisitatijewojefuzedule.pdfIn PDF document text
    • http://jeparilusukopof.epizy.com/26044039313.pdfIn PDF document text
    • http://voperafabekom.epizy.com/gotagiwiwasivatutadofoxik.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_off0000d28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28B 4852 bytes
SHA-256: b3db4e5e9652ab8e5d44161a7f843b4a4989ac7fb98509839f6a8ae9db9a45d5
font_01_sfnt_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 10744 bytes
SHA-256: 1980022267d6d46334647d78097a0be0eaebb7fc827a3935f3215a04eb2170e8