Malicious PDF — malware analysis report

Static analysis result for SHA-256 078d6abdd7914f60…

MALICIOUS

PDF

71.3 KB Created: 2021-09-12 12:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 78e664df4aa747e9889fe3ec2f23f41d SHA-1: 3776ef5466d245481adb1998d6d8b6943e0101fe SHA-256: 078d6abdd7914f60f5f2dac6d57ba3dc6ae40a4b8fdb27bd5fa981b0561466fa
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous links, many pointing to disposable domains and employing UTM parameters, suggests a link farm designed to obscure the ultimate destination and potentially host phishing content or further malware. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://antonellascarpittadesigner.it/userfiles/files/jemidajelexilojevapo.pdf In PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/98279323363.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/95517231084.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d48197672---xukenenofazizibirev.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/damovikawiwusagonukub.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/xodewokokimil.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/punumaxopejomowas.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/26812600363.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/dibofefitujowitifosal.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/79015426296.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/sebidixenofaveko.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/17789482449.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/xokelirorimogurubokej.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/xudomoxarikofoxojopop.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/tugovowuxixofu.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/48876262788.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/kalofi.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/2737901287.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/1281652478.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/segukegevato.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/daxuken.pdfIn PDF document text
    • http://orthopediedelft.eu/files/59092845636.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/1b306ab9e01b847fb2436e42796cdd39/duzikofixufojabuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=incredibles+2+putlockerPDF link annotation
    • 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_off0000b45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB45F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC76 10748 bytes
SHA-256: 78a6fc848b6508d08fa526507e45b7488a3badd7255abea21472906a2418de31
font_02_sfnt_off0000e516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 16664 bytes
SHA-256: 4c399688c3c2196243b567c397897dd2e959eb60ed8db2f9da8b600a53609a0f