Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2fa62a67423b7ef…

MALICIOUS

PDF

77.3 KB Created: 2021-02-26 04:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c32547857521ec479252a51b844b7949 SHA-1: 5b90bd6c6c52cbd0f71bb81b18c761efcdbff868 SHA-256: c2fa62a67423b7ef0cbb7920856c201a5ebf639d09ab5824bd565b865e18fa95
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the lure aspect.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/aws?utm_term=spss+survival+analysis+censored+data PDF link annotation
    • http://timinome.getenjoyment.net/why_is_my_honda_lawn_mower_not_starting.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/how_to_use_keurig_mini_descaling_solution.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/93841424230.pdfIn PDF document text
    • http://mybestchan.online/whitewash_over_black_paintbet0q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_602f6d84e168d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368467/normal_5ff9577219d12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393779/normal_5fcd3e345ff6b.pdfIn PDF document text
    • https://sobopagep.weebly.com/uploads/1/3/0/8/130873740/fijane.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378410/normal_6005c0e040444.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/no_matter_the_wreckage_table_of_contents.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rigutogivopum.epizy.com/akbar_birbal_stories_english.pdfIn PDF document text
    • http://xinirujoki.epizy.com/battle_chasers_nightwar_gameplay_android.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/jadutifazolilavafa.pdfIn PDF document text
    • http://gixopuvap.rf.gd/pululopuletelojenivuwa.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/13369778389.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_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 5332 bytes
SHA-256: 4fa27c95f4ebc48ecf7a9932539ed78dcc020353c346500b414380e9cc134101
font_01_sfnt_off0001055d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055D 10180 bytes
SHA-256: 2fe5daab07535ae02b23773faddd861f3ab9efebf17f0a39ed1c396c0fa3e569

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