Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb983dab1442504…

MALICIOUS

PDF

80.0 KB Created: 2020-11-10 08:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 990c8a6d3ac7f31cdaf414fcee4cb350 SHA-1: 78ed49cf4475eab7e566605c3723c8dc3c32fe99 SHA-256: 9eb983dab1442504203fcf864e50704fdd80f5478533013ea56d02ae8c9b9b8c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are structured as a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary external URI points to a URL containing 'avg secure vpn activation code 2019', indicating a phishing lure. While no scripts were explicitly extracted, the PDF structure and extensive link farm heuristic strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?keyword=avg+secure+vpn+activation+code+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418184/normal_5fa6cabd767bb.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/8051375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f871a75a3cdd.pdfIn PDF document text
    • https://bafuvaki.weebly.com/uploads/1/3/4/3/134336870/kitawo.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/bisutadigaju_buvip_ridefiwisesoti_febije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5f9dfa55e9aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f8c0333e40cf.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/b2729c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f93553ea9b25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f88d7a59cb54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5f9ca18ed8c8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5b4806da-ca5f-4569-b706-6d67f9c6fcab/joao_burning_man.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e83c93b6-02a8-4156-bf3c-0d2239eaf8fb/gevanutuxusugez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ccf0a88-7ab4-4fb9-b589-19e343d123aa/58976670294.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF35 5620 bytes
SHA-256: dc051839d17fe0dc8a13ffff90c59e0a2184bbf9c2497aa7e4f770dfa11b09ca
font_01_sfnt_off0000e271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 14444 bytes
SHA-256: 04dc495894e23a6116489e8a784f7edc1e1bc3ed8c22bcf79c887c8722169752
font_02_sfnt_off00010fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAC 16132 bytes
SHA-256: 43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6
font_03_sfnt_off000124a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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