Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb91c346a96c553…

MALICIOUS

PDF

67.7 KB Created: 2021-02-15 16:52:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 78f7c068f24f9976777738a0270838f1 SHA-1: b8d7b3739fedb4611feaf1da34155a1997b72ad5 SHA-256: 6cb91c346a96c553612ea14668f89c4f9d6b6be805f1d6e1f79ae81d38ef8acb
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic identifying it as a link farm. The primary malicious URLs point to domains commonly associated with phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an intent to redirect users to malicious content, likely for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+to+program+remote+to+genie PDF link annotation
    • http://wigoduxaru.22web.org/fevizijifulolizivugulu.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/hic0hjK/57654841194.pdfIn PDF document text
    • http://lepasipun.iblogger.org/automapper_formember_if_condition.pdfIn PDF document text
    • http://tezosomebapixim.22web.org/concealed_cistern_installation_guide.pdfIn PDF document text
    • http://wabefovelixi.66ghz.com/nilizovujimodor.pdfIn PDF document text
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/a06db5.pdfIn PDF document text
    • http://fuxofexafot.iblogger.org/75672300783.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/tajimipojimo/forensic_odontology_case_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/alien_1_android_name.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/javascript_in_handlebars_template.pdfIn PDF document text
    • http://gotenekopibijo.epizy.com/zevukasogevowarutegukuwif.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/free_coordinate_graphing_pictures_worksheets.pdfIn PDF document text
    • http://wefexafunedex.epizy.com/new_bollywood_full_movies_2017_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/west_elm_bedding_sheets.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_off0000d02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02C 4984 bytes
SHA-256: c7e4c17b8f46b051ffc2af87f0c0f6fa284eeff5cbbba08e3117eadae1ae65be
font_01_sfnt_off0000e11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11B 9736 bytes
SHA-256: 09b0b0d7c3cc1ddcbf1732485b83c69d917f851a361a4f5c901c3d44cae6d809

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