Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98855a5c05e8632…

MALICIOUS

PDF

79.0 KB Created: 2021-03-21 08:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a7b3f2c4772c9b64801eddf2806f0802 SHA-1: 946b7ac2afa4a73e4812b5bf49b03c7aaccac680 SHA-256: d98855a5c05e863238778a5494bf7a875ca2d16c3e8d9c4a1a57cedea07fadbb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document presents itself as a manual for Bose products, but contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to malicious or spam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/wix?keyword=bose+soundtouch+series+ii+wireless+adapter+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc733bb4ddd4.pdfIn PDF document text
    • https://nisikigibifug.weebly.com/uploads/1/3/0/8/130813528/wovamuravuti.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/sagotodopoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427820/normal_5feb5b92f18f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486745/normal_6021949d090f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_60210fa1c3de6.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/bufolulaferiwis-fositetej.pdfIn PDF document text
    • http://nalatakojuzali.iblogger.org/xorabavivuwexazafapopov.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/24bb76e5b1.pdfIn PDF document text
    • https://saxiwevirakete.weebly.com/uploads/1/3/4/7/134715854/697deaf6aa487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455890/normal_6015afedc522a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459036/normal_6002d0c121044.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383924/normal_5fc6776c119df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373259/normal_5fec53422f931.pdfIn PDF document text
    • https://girowotejetut.weebly.com/uploads/1/3/1/4/131406843/kefog.pdfIn PDF document text
    • https://bemafaparad.weebly.com/uploads/1/3/2/6/132681832/1269507.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dezinovuxan.rf.gd/metal_gear_2_pc_fix.pdfIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/cara_buat_cv_file.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/99754481790.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/is_tokyo_disneyland_open_now.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/63327567323.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/chemistry_elements_word_search_answers.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_off0000ec2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 5456 bytes
SHA-256: 605314321ef8ad0005d0ec0c5049349f839910d931dd468ea588086920380057
font_01_sfnt_off0000fea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA5 15012 bytes
SHA-256: eda7d9a2206db228a1430e9cf684a4fe288301a6bbb7983486ad74c9eb4a2d6c

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