Malicious PDF — malware analysis report

Static analysis result for SHA-256 2beef6b925a86b82…

MALICIOUS

PDF

77.4 KB Created: 2021-04-16 07:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2cad7a691e5446cdd5b111096ad17c30 SHA-1: 179c0ec8c5dc6e80f209c351094339d03af7b211 SHA-256: 2beef6b925a86b82a93de7342da0055154dd77a19d5408669c6590b14b247d5c
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://botokaw.ru/strik?utm_term=what+is+gothic+art+and+architecture PDF link annotation
    • http://sotarebesowula.medianewsonline.com/handbook_of_landscape_archaeology.pdfIn PDF document text
    • https://liketoxisok.weebly.com/uploads/1/3/0/7/130739237/vekosasexugetad.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/kewituripofivulin.pdfIn PDF document text
    • https://bawowafakapapo.weebly.com/uploads/1/3/4/0/134042412/birope.pdfIn PDF document text
    • https://pozufijuxib.weebly.com/uploads/1/3/0/7/130775557/fimixuzubazag.pdfIn PDF document text
    • http://devubowoku.mypressonline.com/sizepumizobaxigaged.pdfIn PDF document text
    • http://tesocoin.online/banjo_song_video8gif8.pdfIn PDF document text
    • https://jabizujosewej.weebly.com/uploads/1/3/4/5/134584717/93c9a270307e55.pdfIn PDF document text
    • https://rojirewika.weebly.com/uploads/1/3/2/7/132710632/ca4f0538d47a3e3.pdfIn PDF document text
    • http://buytoday.cc/ableton_live_authorize.auzho71k.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/nesute.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/93913233433.pdfIn PDF document text
    • https://bimotevos.weebly.com/uploads/1/3/4/2/134234596/4502280.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_af69c9efd95d4add9d6b256c7fe56055.pdf?index=trueIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_824971f614f641d0bf08e39ee8295105.pdf?index=trueIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_4ee8992070534f59bd886553a9f82437.pdf?index=trueIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_d8cc135621dd4ad8b91856e950c492cf.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_f7192aef22514da08df075342a59bc8a.pdf?index=trueIn PDF document text
    • https://52aa71f3-9574-4e96-898b-bb16aa893b2c.filesusr.com/ugd/b13a71_eedd5ac0b75a4bc39626bfa94860b73b.pdf?index=trueIn PDF document text
    • https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_bf36189af9714866ab274bb490a00771.pdf?index=trueIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_226179dac32447fcac15cfa3a260db34.pdf?index=trueIn 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_off0000f20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 5180 bytes
SHA-256: 60e8e59e4674df9b90e437e490a3fa23486d1650c0830dcec8e5431caff266fb
font_01_sfnt_off000103b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B1 10624 bytes
SHA-256: 033512d519d3f503ab52843bc3ef0017f3c05cb92a40c4b2c9fd2363bd971f6a