Malicious PDF — malware analysis report

Static analysis result for SHA-256 6790083d03390d1c…

MALICIOUS

PDF

62.7 KB Created: 2021-01-16 19:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 77c22646ee156201a3110ac01c767ce4 SHA-1: f259b028ccb91e8607cfc1258be5ac974b1e0420 SHA-256: 6790083d03390d1c9f8fccb683fc75dfac6dc6e1a4d8ff6abace2188087cca9f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, containing numerous external URLs pointing to various websites, some of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and the overall structure suggest an attempt to direct users to potentially harmful content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/wb?keyword=city%20smash%20unblocked PDF link annotation
    • https://bopifodefow.weebly.com/uploads/1/3/4/3/134383970/fikibal.pdfIn PDF document text
    • https://site-1174394.mozfiles.com/files/1174394/skyblock_servers_for_minecraft_bedrock_edition.pdfIn PDF document text
    • https://site-1244589.mozfiles.com/files/1244589/pazalodebineg.pdfIn PDF document text
    • https://rawewefugu.weebly.com/uploads/1/3/4/3/134394717/fakufugepikafidik.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/b1f2e631cbd8a2.pdfIn PDF document text
    • https://site-1168281.mozfiles.com/files/1168281/best_free_kick_takers_in_football_history.pdfIn PDF document text
    • https://bozaveruri.weebly.com/uploads/1/3/1/4/131483492/pavujo-wefexedilifuri.pdfIn PDF document text
    • https://nifixivenugoku.weebly.com/uploads/1/3/1/8/131856212/rakexe.pdfIn PDF document text
    • https://lukazerud.weebly.com/uploads/1/3/4/3/134343231/67569.pdfIn PDF document text
    • https://renokiva.weebly.com/uploads/1/3/4/3/134353994/zozifarexotorugifike.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/xusano-jonaz-movud-subusirujizize.pdfIn PDF document text
    • https://site-1241671.mozfiles.com/files/1241671/articles_grammar.pdfIn PDF document text
    • https://site-1177722.mozfiles.com/files/1177722/lixapudosunaz.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/2271003.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/nademopor/9177449280.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/44814213856.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_off0000bb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB90 5292 bytes
SHA-256: 6517d61b8fef902ffbd88633c010005cd2f6188983d1f5271c3ea5ec769c1c0b
font_01_sfnt_off0000cd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD68 9708 bytes
SHA-256: e5756bd6a536a8483700839565a05a1284191b6fd2a66ae0a744972a42488098

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