Malicious PDF — malware analysis report

Static analysis result for SHA-256 6432819d921beb58…

MALICIOUS

PDF

90.5 KB Created: 2021-09-09 06:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 354b3dd1b93f1ab1af8add5d62c875e5 SHA-1: d85ebc6e3d3e4e64eefbfdd888010d0b7567a04a SHA-256: 6432819d921beb58bb2b29349d551072a37bc7c8557f271b39b2850fc294bb15
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The PDF contains an embedded JavaScript stream and numerous external URIs, with one notable URL being https://synerhu.ru/uplcv?utm_term=conjuring+the+devil+made+me+do+it+stream+online. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to redirect the user to the aforementioned or other malicious URLs, facilitating phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://synerhu.ru/uplcv?utm_term=conjuring+the+devil+made+me+do+it+stream+online PDF link annotation
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397dff9747e---49075107794.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/wevop.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/mofomokawulodomugovibusun.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/66481664862.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/69333424146.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/43764485690.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/60195740743.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/muzarofozisekag.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/gofikupigo.pdfIn PDF document text
    • https://bliznacite.dvsportbg.com/files/15717483753.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/rolejaveduzoxoj.pdfIn PDF document text
    • http://kezmosas.hu/files/file/migalulumiketegodabavel.pdfIn PDF document text
    • https://copacndg.com/images/uploads/files/kiwimasogelani.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22114285726.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16130ac455fb73---jozekabeno.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/81587458170.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/73766834046.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/vukijise.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/32837740045.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/zugurupapovezukusagut.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-6/20210906215438330219.pdfIn PDF document text
    • https://butchercurnow.com/img/shop/contents/suzur.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/30220479355.pdfIn PDF document text
    • http://winso.tw/userfiles/file/tilopisowafadokakerab.pdfIn PDF document text
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/xovugarisidob.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_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 11020 bytes
SHA-256: 63e2ec6517ed3b30aaf487906516bde14efe5d241b5c82948d604a15fce026fd
font_01_sfnt_off00011487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11487 18120 bytes
SHA-256: 9da954cb151cc9cb3f6eceba5e0aecb03e350deeaf230deb4c704ffb8f1e90fc
font_02_sfnt_off00014386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14386 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1