Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2df18a79dc8d212…

MALICIOUS

PDF

71.2 KB Created: 2021-02-22 21:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 156ffa02162345ecdd8fa7c6f28b164b SHA-1: 28c379cefe7cd0dd449059e60e284395d79849d2 SHA-256: c2df18a79dc8d212816c7e4c5e0fda9ba44847c1b491ab638e0aa9a28ffd2248
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link. The embedded URL, 'https://yafferge.ru/aws?utm_term=ventajas+y+desventajas+de+que+vivamos+en+el+modo+de+produccion+capitalista', is a strong indicator of a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to capitalism, likely serving as a lure. No scripts were extracted, but the presence of malicious URLs and the ML classifier output strongly suggest a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=ventajas+y+desventajas+de+que+vivamos+en+el+modo+de+produccion+capitalista In PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/gjihjh3/gardenscapes_2_free_online_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381997/normal_60081caac4128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_6031113cc9632.pdfIn PDF document text
    • http://abanca-electronica.com/17776019507q62yh.pdfIn PDF document text
    • http://hopecommunitynaz.com/58280441439v3shy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_602985e991c9e.pdfIn PDF document text
    • https://cdn.sqhk.co/pijavagoke/tbDOfgg/wellington_park_management_plan.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/49077342100f0usy.pdfIn PDF document text
    • http://noncomform.space/bethesda_system_for_reporting_breast_cytology5wyhv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446264/normal_5fc70d81830e2.pdfIn PDF document text
    • http://leadtop.co/34176202554w7wwh.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/gudukupir/youth_football_gloves_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/75214609249.pdfIn PDF document text
    • http://tanazutoja.rf.gd/how_do_xbox_360_wireless_controllers_work.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/alexa_echo_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/finance_manager_cover_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/96680418166.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_off0000d543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD543 5548 bytes
SHA-256: 351ed0ea91e4c20983eb39f9ea7bc7ec48e8a6e386cc57a22bc6e9e82bd41935
font_01_sfnt_off0000e822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE822 11248 bytes
SHA-256: 260df96ff6949ef727a5b875d0d855aca2e4f9f5a4986950288dc455931dc4d7

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