Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be0536b7e669d96…

MALICIOUS

PDF

80.7 KB Created: 2021-04-05 15:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 767cdaf1a811e886909dd62726a60c52 SHA-1: b1095899f15cb0b23757ea2174ca653143f56208 SHA-256: 6be0536b7e669d9621ec667fb05efc63fa39ce0b17f9cd88383b977db14c99c2
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/strik?utm_term=que+es+factibilidad+economica+de+un+proyecto PDF link annotation
    • http://xawegap.mywebcommunity.org/samir_okasha._2016._philosophy_of_science_a_very_short_introduction.pdfIn PDF document text
    • http://nukadaz.iblogger.org/child_and_adolescent_mental_health_a_practical_all_in_one_guide.pdfIn PDF document text
    • https://penonogam.weebly.com/uploads/1/3/4/0/134012545/sizemaxezumexuw_sunevezu.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/i3LjAhb/pelixunikazalipogada.pdfIn PDF document text
    • https://zijoganidilo.weebly.com/uploads/1/3/1/8/131856317/9095659.pdfIn PDF document text
    • http://xoparubupog.iblogger.org/the_blue_book_of_grammar_and_punctuation_download.pdfIn PDF document text
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/1119266.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/jf22idP/where_to_buy_rainbow_cake_in_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/jhhaAjc/vojasofugireradefemidiki.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/ih3Ojfz/32717055014.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/h3Hjfi0/diranaxetogidivefasepax.pdfIn PDF document text
    • http://mosenub.22web.org/the_game_plan_netflix_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nigimul/tmux_cheat_sheet_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/79701519356.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/galaxy_theme_store.pdfIn PDF document text
    • http://luzavevamafidix.epizy.com/nuxoredofugufedimi.pdfIn PDF document text
    • http://lexamokoxerum.atwebpages.com/perimeter_and_area_formulas.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/55196218342.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/joseph_campbell_the_power_of_myth_documentary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5E 5488 bytes
SHA-256: 7299cf2b37f85863cfae3bf6c75bf51eb7ccfc1a3a0dea335f6c143d9a304173
font_01_sfnt_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 11784 bytes
SHA-256: cb2bee73f7d76e6a802d76860298834108c935f1feab9c394029db30ed65b9d0
font_02_sfnt_off00012543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12543 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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