Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f1f1d2ec87901a…

MALICIOUS

PDF

69.8 KB Created: 2021-09-15 21:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c72e2815cb23800ba52c6296ad0f8a54 SHA-1: f636bb00d24cf8f9fcd7b69c883c15fee50ce82d SHA-256: a0f1f1d2ec87901a3409c77dc4bcde4ddc2c48c2174a110334820321b46466bd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ada6477aaf---78237856412.pdf In PDF document text
    • http://mcutech.net/files/godulaxokidev.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613595be7e0a7---62682268884.pdfIn PDF document text
    • http://www.celso.org/download/nepowikunogisur.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/kefefukojulul.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/poguvudujokitutawejumir.pdfIn PDF document text
    • http://ags-car.60km.com/upload/files/37040447206.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/fuzepuzipaduj.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/jivopunulunirupezefij.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/dezozopejedefusurikes.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/wuliwuxaselu.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/vavirubutu.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/serosabozuzimibesugurat.pdfIn PDF document text
    • http://scsytech.com/upload/files/sidukix.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/tebatetuzupelomamopa.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/15926523822.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/rujivumademasasu.pdfIn PDF document text
    • http://kelvista.lt/images/files/fuwirekitosevapedi.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/pimizeretifedaladigani.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/26677521897.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/nemetotofasezovavusires.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/jubofawulorub.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/safezojovoves.pdfIn PDF document text
    • https://bor-diing.com/upload/files/32597765224.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/26918003236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=words+that+start+with+g+to+describe+someone+positivelyPDF 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_off0000b0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AC 15088 bytes
SHA-256: 0119c772e60bfd6c6b0a815edf157b2218f139f46e83bbeb4577c87c4797c119
font_01_sfnt_off0000d6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eeec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 11360 bytes
SHA-256: 6cf6248936cbff2ac58ae4002f53cb3ce9e1d35ee13d3e979440a3177e8eca46