Malicious PDF — malware analysis report

Static analysis result for SHA-256 e701fc0992deaaff…

MALICIOUS

PDF

76.2 KB Created: 2021-05-25 00:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6d7273fac29bc0fb9047757173804224 SHA-1: 8bec34dc3e68bee5a47653135afd7299d4761e69 SHA-256: e701fc0992deaaffaafa15b29ace7d0790821814d4fe8ab10b094b98b1a86b69
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely to manipulate search engine results or distribute further malware. The primary external URL identified, 'https://resalured.ru/strik?utm_term=what+is+bitterness+pdf', is flagged as unknown reputation, further supporting its suspicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=what+is+bitterness+pdf PDF link annotation
    • https://ziluxofizavamo.weebly.com/uploads/1/3/6/0/136009732/rinaxivun_jorodu.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/rozajigirow-pitalezubetite-nilosifowen-dexuzepekube.pdfIn PDF document text
    • https://nujodobenume.weebly.com/uploads/1/3/4/4/134441993/b424a450a7589da.pdfIn PDF document text
    • https://jotesufuxave.weebly.com/uploads/1/3/1/4/131483421/waxatemolitax_redurapi_rixudava_nutukejitis.pdfIn PDF document text
    • https://revuduxaj.weebly.com/uploads/1/3/5/3/135333309/b5a290175f.pdfIn PDF document text
    • https://luzafoku.weebly.com/uploads/1/3/0/8/130814295/bizaxomam_detimuvotit_todasoxekimo_ximititi.pdfIn PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/kumorov.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/753789573b7f10.pdfIn PDF document text
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/936677.pdfIn PDF document text
    • https://zapeledi.weebly.com/uploads/1/3/5/3/135314532/9380630.pdfIn PDF document text
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/5647241.pdfIn PDF document text
    • https://duragafadave.weebly.com/uploads/1/3/1/4/131438389/nobikefowofa.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/wiworiwanu_nenogagor_xoxolove.pdfIn PDF document text
    • https://pazerutafu.weebly.com/uploads/1/3/5/3/135392620/2258489.pdfIn PDF document text
    • https://fidimamafiw.weebly.com/uploads/1/3/4/6/134624465/wovarofogi-jowojupumuri.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/xajowu/49452666418.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/tipos_de_sistema_operativo_en_una_computadora.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/blurring_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/89863637870.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/ruligaluvebikukamuw.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/luzekojugatabafimukapix.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/sister_souljah_midnight_series_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/60462899691.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_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 5252 bytes
SHA-256: 993034192550b606386286dcf77d408cd3abeffbfeae6b8c33ef06d513826971
font_01_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 10428 bytes
SHA-256: bd79b6772a1d5af933c35861c06b711d70a2962310ce3dbfbe2ff569a44f7119

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