Malicious PDF — malware analysis report

Static analysis result for SHA-256 575afa06cc860753…

MALICIOUS

PDF

73.8 KB Created: 2021-04-14 00:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a0aeaa34c08d80688747759d36ee7b50 SHA-1: b9e67af4dde3033d75a0b46d4b30665ac2302ba0 SHA-256: 575afa06cc860753aa196eabb0d3063cd915da870b51f391830cf787473993d8
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded links, such as https://botokaw.ru/strik?utm_term=sap+customer+list+with+email+address, suggest a lure to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://botokaw.ru/strik?utm_term=sap+customer+list+with+email+address PDF link annotation
    • https://cdn.sqhk.co/pixafosabow/JLaghgc/komunovozijefomunilokex.pdfIn PDF document text
    • http://navaram.online/34304308957b0e7x.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/jf2iiyW/4_function_calculator_meaning.pdfIn PDF document text
    • http://organic100.fun/ledebuzatovumamelerejopogn0mqb.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/fhcvFhe/best_powerpoint_templates_for_academic_presentations_free.pdfIn PDF document text
    • http://thefortykuti.com/how_do_you_reheat_pasta_alfredoxw5a1.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/YjeTxOG/rune_guide_high_wizard_ragnarok_mobile.pdfIn PDF document text
    • http://mybatut.store/apache_superset_quick_start_guidelqrcf.pdfIn PDF document text
    • http://expressday.online/warlings_2_hack_apkgemy5.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/pisedij/gogivepogisuxuboguxala.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/11206869762.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/54864167224.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/how_to_remove_warn_locking_hubs.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/jelifojoxatupatasumeza.pdfIn PDF document text
    • https://7f02de5d-eb05-47fb-ba64-0b2557589119.filesusr.com/ugd/c34eac_a04a42e836614c3bbba633e39727baa4.pdf?index=trueIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_b9b44a0ab30243eab2368b4147e74172.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/delirium_book_movie_where_to_watch.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_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 5508 bytes
SHA-256: 341864e0a0d9053b0eefea4507fd612c2911ccb6b9b57a9c185e9383bc873e5d
font_01_sfnt_off0000f518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 10680 bytes
SHA-256: 7fde9078fb21e8cb8e875f338a0cb1ccc392342f78dae8fe9666140229ae6f90

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