Malicious PDF — malware analysis report

Static analysis result for SHA-256 434bc1282599b00e…

MALICIOUS

PDF

94.9 KB Created: 2021-05-20 12:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 363dbb8de3b9991c5fe8b1d2611ba023 SHA-1: ddd229d65cb1830bcac54154e6186f7f4a8ae641 SHA-256: 434bc1282599b00e0457d5ab8098247fef8908279194c74587508cebc0556764
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 0.9980

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://kuzutuzo.ru/strik?utm_term=what+is+b1+and+b2+voicemeeter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380675/normal_6001010e02f96.pdfIn PDF document text
    • https://buneruwig.weebly.com/uploads/1/3/7/5/137512718/dinazitom_bavesokinawipez_fakogupivasilag_mosevi.pdfIn PDF document text
    • https://suruwizad.weebly.com/uploads/1/3/4/7/134766156/xagomaxenitoxid.pdfIn PDF document text
    • https://zalajugimawif.weebly.com/uploads/1/3/0/7/130739284/zitutunatarivuxenafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_6063a0d431606.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444100/normal_5fcc8f44bf08c.pdfIn PDF document text
    • https://feverawujebuv.weebly.com/uploads/1/3/5/3/135314909/a24393.pdfIn PDF document text
    • https://nejotadig.weebly.com/uploads/1/3/1/1/131164569/xuvelipuvutewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_606b0f9a0e3fe.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/vezakujo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_6068c82e1074f.pdfIn PDF document text
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/notariderasi.pdfIn PDF document text
    • https://xakebugus.weebly.com/uploads/1/3/4/0/134018628/woduv.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
    • https://s3.amazonaws.com/gudukupir/how_to_turn_off_pentair_salt_cell.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/plato_republic_book_1_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/hinge_theorem_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/irb_ansatz_formel.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/matrimonio_sobre_la_roca_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/call_of_duty_zombies_aptoide.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/sivepibogudevetux.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/fuse_template_angular.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/buzuja.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/ecole_alternance_informatique_paris.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/37533256148.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B03 5332 bytes
SHA-256: 2804e598f14340b560e18359c13451a933d791ead0cba30203aebf887f308d72
font_01_sfnt_off00012cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEE 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001357c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357C 12264 bytes
SHA-256: 45a6dbc61db996c0b3ce84f90a2bc3b722e91b40a77d17d8048046a45ccef608
font_03_sfnt_off00015d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D53 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34