Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ecf28fb1183e25…

MALICIOUS

PDF

86.7 KB Created: 2021-03-25 11:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5bdf7a6f96288f7b6f496c70a72952ee SHA-1: 119fb29c399ca3c6a9dea966c3a2b33920f178f3 SHA-256: 06ecf28fb1183e252a13d2f0e5e41ec49a2a52267ee6b6bd461371c4dc4c8c0c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://druttle.ru/123?utm_term=plastic+laminated+plywood+sheets PDF link annotation
    • https://tejojapifofomo.weebly.com/uploads/1/3/4/3/134339563/7614143.pdfIn PDF document text
    • https://nenonafadigis.weebly.com/uploads/1/3/4/8/134856929/tiwupevewonow.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/puzewiled.pdfIn PDF document text
    • https://rezapikuxodet.weebly.com/uploads/1/3/0/9/130969426/173e6218a3f963.pdfIn PDF document text
    • https://tisuzibe.weebly.com/uploads/1/3/1/3/131379312/tagag-vosikejirepoxik-rutudolatipoz-fixul.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/xitogiso-nevuxevuxade-sutesupapebin.pdfIn PDF document text
    • https://kapelivoxiri.weebly.com/uploads/1/3/4/0/134040857/dozifokil.pdfIn PDF document text
    • http://womebaziwime.iblogger.org/radawakode.pdfIn PDF document text
    • https://tojaluteder.weebly.com/uploads/1/3/4/3/134384479/pegolobuse_fefisulol_pakovujaviz_koxodemaz.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/tixedujegibex/30462732075.pdfIn PDF document text
    • http://fezefujeziged.epizy.com/metefuwizes.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/kivovozomewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30aa745f-3377-412d-a3c6-8836b437f98c/95717113395.pdfIn PDF document text
    • http://bejiteviv.epizy.com/annoyed_bird_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/betiyada_jaga_kannada_song_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/eas_body_for_life_workout_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f84de506-1b17-494e-9b97-acda185fbeeb/que_es_lo_mejor_para_comer_despues_de_hacer_ejercicio.pdfIn PDF document text
    • http://zexaxenobu.rf.gd/26962695005.pdfIn PDF document text
    • http://tividisexagit.epizy.com/dilotizukukevawovebaw.pdfIn PDF document text
    • http://gefuxuxoj.epizy.com/tcs_technical_interview_questions_and_answers_for_cse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f860c2a-49c0-4d23-abd4-6f8849f87516/47416440381.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_off0001157b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157B 5412 bytes
SHA-256: 38969811f7b06556bb7cef9ace30cf9bddb2839061eedc69e929ec386a4e6182
font_01_sfnt_off000127d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D2 11148 bytes
SHA-256: 546c9964de382e67e23934aed28577b1392f5f722e873aa88c93145cb125fde9

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