Malicious PDF — malware analysis report

Static analysis result for SHA-256 a866bb264042a8ad…

MALICIOUS

PDF

87.2 KB Created: 2021-09-14 12:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5c01e92c9a0db95148aa3b25275e9afc SHA-1: 109679b0fa2a8179ec99dc2e91541be35af12d14 SHA-256: a866bb264042a8ad2f58ef6f5b183d08b09e4bc72ab9bd5c59f031fe7c3eacd2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to malicious websites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high number of distinct hosts suggest a phishing or spam campaign. ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://queure.ru/uplcv?utm_term=no+1+launcher+for+android+in+the+world PDF link annotation
    • https://abriganature.centralcms.cloud/galeria/files/rubojujopewuginidag.pdfIn PDF document text
    • https://h16hr15k-h19hr37urn.com/contents/files/lijurovusalowalivurujop.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/bebibupolava.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/weziradolifenivivosavi.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/gazanovi.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/najifuxogemigiporerak.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/funewejebovulil.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210908035035.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/wovokidunozejosumesipe.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/40212455435.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/luzupev.pdfIn PDF document text
    • http://builderall.info/userfiles/file/86298981439.pdfIn PDF document text
    • https://exam10.menapoint.com/app/webroot/upload/files/36687304709.pdfIn PDF document text
    • http://juha.be/_files/file/piwemufu.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/zarulidulevezuwujumanez.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4f91af498---funebizok.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/tinusetovuxajozi.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/jimenesesemebikab.pdfIn PDF document text
    • https://rjpexport.com/files/vumufirujagofuv.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/bokek.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109121628465360.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/rosukud.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/dedudimubelelovutulepul.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_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 17176 bytes
SHA-256: dd4ce0a9f0a2b8779a7f6b759b0ce7387d9297867c5e84451dffced87095373f
font_02_sfnt_off00013675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13675 10620 bytes
SHA-256: 43e1e1ed731b11c906d09e800887d568fa5e35115e9c6308f8c6ffbd3cd3c412

Open this report in the interactive analyzer, or submit your own file for analysis.