Malicious PDF — malware analysis report

Static analysis result for SHA-256 768b77a6675d09cf…

MALICIOUS

PDF

69.2 KB Created: 2021-02-20 20:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a563bf94a50586c70eb5bbfb7e1935f1 SHA-1: 7d16011cbf6cdb9419d18ec151a81b292cc5d903 SHA-256: 768b77a6675d09cfe56d0bc9309ddc9e7ae26f49c5f42b1b187d81c8560d420c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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.
  • 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://jacksth.ru/wix?keyword=sony+remote+control+codes+for+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374686/normal_600f404cabb8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_6010af298659d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450046/normal_6012830b350fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413346/normal_60261497ca2ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_601707fdec309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452837/normal_5fe06aee6a3d6.pdfIn PDF document text
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/doguzedaleku.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/jiwezofiloposube.pdfIn PDF document text
    • https://bemofoserobonuw.weebly.com/uploads/1/3/0/7/130739893/2028787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_5fea39e6479c3.pdfIn PDF document text
    • https://buzufurabobozu.weebly.com/uploads/1/3/5/3/135304208/e2603.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wijabotivov.epizy.com/gogujobure.pdfIn PDF document text
    • http://savekuf.rf.gd/fumanogidu.pdfIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/chimney_inspection_report_template.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34D 5220 bytes
SHA-256: 45dbb57d7becb1518f8a692d15f5dd146613005c87bb02d70c179eb0e649055c
font_01_sfnt_off0000e510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 10240 bytes
SHA-256: 1ee2cdd990e0a8f16dc6d389a5d2c863d7cf9a86f44546d0400010ba51edc667

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