Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1c79f1521c8c95…

MALICIOUS

PDF

117.3 KB Created: 2021-01-19 20:24:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e9ab04faa620dc8a553c7af6a1d16ba7 SHA-1: 0bdf389c54d66938a2d801ef6818f59ea81bd97c SHA-256: 6d1c79f1521c8c95fa7a6183293e061dfb71da82bc06421cc850f158401e2ec7
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm containing 26 external PDF links. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=mass+effect+sovereign+speech PDF link annotation
    • https://jevejokanidepit.weebly.com/uploads/1/3/0/9/130969277/34e40233052.pdfIn PDF document text
    • https://dugizade.weebly.com/uploads/1/3/4/4/134442098/zozinoziko.pdfIn PDF document text
    • http://zubosoxi.22web.org/xojurigazikob.pdfIn PDF document text
    • https://zupalopozaguri.weebly.com/uploads/1/3/2/3/132302876/famefuwilomumus-vesam.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/online_javascript_editor_formatter.pdfIn PDF document text
    • http://fujepopini.22web.org/rarirasakusetafutigiduk.pdfIn PDF document text
    • https://toriradusug.weebly.com/uploads/1/3/4/7/134744904/3521895.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jefiwimagi.epizy.com/national_lottery_authority_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/cs_go_pro_players_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/antisense_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/sliced_almonds_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/company_of_heroes_tales_of_valor.pdfIn PDF document text
    • http://lugimes.epizy.com/sesumiremowowurogaleze.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_off0001911a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1911A 5308 bytes
SHA-256: 09b8d6d72897d4d8d2b2734cd81e0087b65427ccf0ff4d94a619f15fa76add45
font_01_sfnt_off0001a33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A33F 10944 bytes
SHA-256: 4de9178a02a89624aa0b23f0f9d4bf98e245e0665512551f72ac48e3674b45fa

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