Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f7753a93f11b40…

MALICIOUS

PDF

54.6 KB Created: 2021-09-28 19:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fb9f9f933246b87c4b538d85d4c90ab3 SHA-1: 766485e35d6c761847cff75eb21d3773fe75da02 SHA-256: 36f7753a93f11b40a4a98de334623cd6e92a5a0b915199f34c896b238e50b19c
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6873

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 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
  • 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://pixomot.ru/uplcv?utm_term=moto+g+5g+price+in+india+launch+date PDF link annotation
    • https://bomberosdenavarra.com/userfiles_nexo/files/rafipazutik.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/35553915066.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/28941365865.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109022321266288.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/veliweromotisaga.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/monud.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/nemid.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/50568982503.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/sukokasanija.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/fofizoduxalekaru.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/belavagekameje.pdfIn PDF document text
    • http://mq-water.net/upload/92528924186.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/33167389993.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/96397397281.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/7860844343.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/xonasilodoneriti.pdfIn PDF document text
    • http://zgic.ru/!upload/files/29234610199.pdfIn PDF document text
    • http://client.diffuse.info/files/mofewabonozoxapujuduju.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/14645088272.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16151069ed9ad5---daromaravujuxefaw.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/wemomuxovifowawofoxo.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/66168717282.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614e5e34dcba0---vijixivisozosevekovefa.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/39979653337.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/vimasuzesoperivefoziwupo.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/givinumesujovevuki.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB473 10852 bytes
SHA-256: ef836696a58ea715e050222e789c2eed04a10f04d3d4f3dd7991c8670c5c3e25