Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e26287ecee3d3d5…

MALICIOUS

PDF

79.2 KB Created: 2021-04-26 05:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6aabc86b2260d1c2855b1edf61ad27f6 SHA-1: cafffff40b9a158e4b4f2e3627f400e63fa87e14 SHA-256: 5e26287ecee3d3d528badd89952c198c9663ec66bf5885090b899b93448b7079
156 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 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=readiness+for+enhanced+comfort PDF link annotation
    • http://kixetojonomezad.22web.org/nawox.pdfIn PDF document text
    • https://dunojezeb.weebly.com/uploads/1/3/4/5/134586234/vuzerasoporotugaxe.pdfIn PDF document text
    • http://gagelepapu.22web.org/cbse_sample_paper_2020_class_12_maths_solutions.pdfIn PDF document text
    • http://taniduvubaz.22web.org/65913102077.pdfIn PDF document text
    • https://paseruvuweduzuw.weebly.com/uploads/1/3/1/4/131437476/80dfdebdc6.pdfIn PDF document text
    • https://gatojodegapov.weebly.com/uploads/1/3/1/6/131637656/mogibazesoxox_wexilutadok_wewetesedegop_vififuxegum.pdfIn PDF document text
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/1402704.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/dowavelaxam/nopegimagupu.pdfIn PDF document text
    • http://sekizipax.rf.gd/65043956743.pdfIn PDF document text
    • http://kobezitidub.rf.gd/que_hace_un_mecanico_de_mantenimiento_industrial.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/1749544783.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/77822164216.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/fekefuwob.pdfIn PDF document text
    • http://tununik.epizy.com/84166245015.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/bitikokupufimamizaruvotu.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/voltage_regulator.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/gollum_s_song_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/nokumipel.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/flixel_cinemagraph_pro_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/tudobolobejij.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/66425189088.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 5236 bytes
SHA-256: 663ec1a82626719e41fab4e3736a1673a4f1429cce1a6fb551014170b63f43a6
font_01_sfnt_off00010775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10775 11812 bytes
SHA-256: 004659074fc33d5639d15f84b13bfd430886808eef57e33ddac75ab7f91ba723

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