Malicious PDF — malware analysis report

Static analysis result for SHA-256 06724a8a7d49fd6e…

MALICIOUS

PDF

92.4 KB Created: 2021-09-16 16:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 34cf2f869ab33b887a2377079d7d62b2 SHA-1: 26e0a88aaa32f552a88b3df551f9311b8eb84d7e SHA-256: 06724a8a7d49fd6e1c957f5ed9f4d3437f38576d2ff1eac7d4f0a410decd2b49
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to link farms on disposable hosting, indicating a phishing or malware distribution attempt. The presence of external URIs and the link farm heuristic strongly suggest the intent is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 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://pistant.ru/uplcv?utm_term=idbs+bus+simulator+2017 PDF link annotation
    • http://seowonbattery.com/files/fckeditor/file/343118901613bb42993eb6.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/bowebuz.pdfIn PDF document text
    • https://blugarden.eu/file/26686764376.pdfIn PDF document text
    • http://c-amc.com/upload/files/45870248982.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/zufotavevejabotituz.pdfIn PDF document text
    • http://ccsl.asia/files/sepulubaxopigulewobove.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/3412dbac946325e721f20147f5fe9c99/74702620104.pdfIn PDF document text
    • http://hidropro.hu/upload/67393472063.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/rixubovew.pdfIn PDF document text
    • http://safarang.com/basefile/files/3237429637.pdfIn PDF document text
    • https://gameclub.by/uploads/files/kanefewikopuki.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/wisetemaj.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/nitujuduka.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/88490003341.pdfIn PDF document text
    • http://ecohouse-lab.de/userfiles/file/bisoburonopomegulotijegug.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/varek.pdfIn PDF document text
    • http://levotst.com/uploads/files/negamekif.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/1379731979.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/dojajijavupurejinojegip.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161363824ba42c---vukodofirogatovoxabivoje.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/runemazutavodagowalo.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/51418566198.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/71377818410.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/91233872587.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210903225352.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/18502413612.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EB 18392 bytes
SHA-256: 1eae1df693078298fa024fa797ffb09a5da19b2ecc0e5daac8929a7510b3a58b
font_01_sfnt_off000131e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A00 10708 bytes
SHA-256: d496630e8673a080a8b0f790e6dd1016788f6682048c93db3ac64e0fceb9233e

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