Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17dec10d057567f…

MALICIOUS

PDF

59.9 KB Created: 2020-12-26 05:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bc27bceae40611fb129eba44fbf1b3b9 SHA-1: 12799d16c169613ca6499e855ea82e00ecc4c8b1 SHA-256: d17dec10d057567fff4edc00b28644b3a00093842fb35818e495cf25aff4622f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to multiple PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests the document is designed to redirect users to potentially malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://traffset.ru/strik?utm_term=brainy+zombie+hero+pvz PDF link annotation
    • https://cdn.sqhk.co/goremujoz/aGjbhgJ/gifapev.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/6933567.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazemi/xukadatefed.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/48385806199.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/memory_card_data_recovery_after_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/codehs_7.2.6_paint_splatter_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34824fd0-c464-4ed5-a58e-e75991548539/sodunirokolune.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/litugivogetiridifola.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/33602784952.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_off0000b047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB047 5248 bytes
SHA-256: f9d24728bf1a438da36a0c9f8ed3cde69b0315632a50a1fa1849ae6d395ab82c
font_01_sfnt_off0000c206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC206 9860 bytes
SHA-256: 2d108591f672d8d710fa9557a576e2ef46db708a1340d4693d31baa6f2e099a0