Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a2c4b976261a56…

MALICIOUS

PDF

68.4 KB Created: 2021-05-01 00:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 63c25347005fc6c57b675b41680d3105 SHA-1: 4168b490e4e88023d69958cd436b2157c52b2c3f SHA-256: 84a2c4b976261a56bd04e972172a1aa09bb197b5807d3678ead748e9a34efdfa
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 0.9992

Heuristics 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=soundlogic+xt+bluetooth+alarm+clock+radio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461216/normal_6038559461cce.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/fezewifu_sosej_posulizebalo.pdfIn PDF document text
    • https://zofitete.weebly.com/uploads/1/3/2/7/132740948/3103844.pdfIn PDF document text
    • https://fusorebumobem.weebly.com/uploads/1/3/3/9/133986296/3728077.pdfIn PDF document text
    • http://lunamawel.22web.org/nuxinoram.pdfIn PDF document text
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/3312989.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/tulov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464319/normal_603312f545249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500895/normal_5ff295f32a811.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/fe1d9589a0ce4.pdfIn PDF document text
    • http://kenufapozij.22web.org/boysen_paint_color_chart.pdfIn PDF document text
    • https://tebojejuket.weebly.com/uploads/1/3/4/7/134764489/tabakekuvo.pdfIn PDF document text
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/pudilipujojekazoz.pdfIn PDF document text
    • https://tewizoduwab.weebly.com/uploads/1/3/5/3/135341898/nivekana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370064/normal_5fdde40262463.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/mowadexevujepufuj.pdfIn PDF document text
    • http://kuxufijum.iblogger.org/euphoria_bts_sheet_music.pdfIn PDF document text
    • https://forelidik.weebly.com/uploads/1/3/0/7/130775511/famavukarala-weviza-tamomawizuroz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://notovaraze.rf.gd/88600203457.pdfIn PDF document text
    • http://waruzav.epizy.com/40996228725.pdfIn PDF document text
    • http://vurosija.epizy.com/algoritmo_de_la_division_ejercicios.pdfIn PDF document text
    • http://nudifezidezi.rf.gd/calendario_escolar_2019_panama.pdfIn PDF document text
    • http://bunisanabasa.epizy.com/bidomevixagixo.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_off0000cea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA1 5548 bytes
SHA-256: 003b6b8083cc0f6954a6f6d94598ad6c009af867abb14bc3117aa3632e801023
font_01_sfnt_off0000e159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE159 10060 bytes
SHA-256: aa5c05db4748934686be580dfba365ddadceb4173adb0cb4165c6c927d83728a

Open this report in the interactive analyzer, or submit your own file for analysis.