Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc28f7148299f2c5…

MALICIOUS

PDF

88.3 KB Created: 2021-04-23 19:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 112f398854e097eaad397ca3e4b89da6 SHA-1: 26bde1dc2c5108f5a810bf72b8c5d076691033eb SHA-256: bc28f7148299f2c5d6ce058ed8e159a18d07943fda233b1e966877cb59b36c8b
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of many external PDF links suggests a link farm or SEO poisoning tactic, likely to obscure the true malicious destination.

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
  • 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.
  • 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.
  • 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/strik?utm_term=mainstays+tension+pole+shower+caddy+assembly+instructions In PDF document text
    • https://cdn.sqhk.co/zirevazul/AShaEgh/olympic_logo_2020_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/ahJiics/8908254812.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/QTZhiJm/50212974195.pdfIn PDF document text
    • https://mokitapakajare.weebly.com/uploads/1/3/4/8/134885173/a6caf423a08a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_605972e418d5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_604a925ee9041.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/q4tsgeX/word_cookies_red_velvet_11_special_level_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/aibZiff/advertising_definition_in_your_own_words.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/92dd6d55e5113.pdfIn PDF document text
    • https://cdn.sqhk.co/pejozujemu/hdNhbRn/rise_of_kingdoms_commanders_unlock.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/bjtXStm/ragdoll_fall_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_604015012c8bf.pdfIn PDF document text
    • https://juzopuxenepin.weebly.com/uploads/1/3/5/3/135383483/2122400.pdfIn PDF document text
    • https://jomezafivawig.weebly.com/uploads/1/3/1/8/131856232/6e957332ea100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/64cbcd08-bd0f-4ce0-8c88-2be60cebb451/somogivowusiwagivegiropaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d702ec-b85f-40c0-85c9-b207e599cfeb/the_largest_source_of_carbon_dioxide_emissions_from_fossil_fuel_burning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e52043-7fc4-4031-8ac8-e1d1a1d83f9d/how_to_access_secret_samsung_tv_service_menu_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f690b726-5b56-46ee-abfe-d46033d5569c/27223613830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4deb9e2c-732a-41d5-887f-7d3ff2fb60bb/sat_practice_reading_test_3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b33e69a-865c-4ecf-8107-745841641d1a/typography_business_card_design_inspiration.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_off00011920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11920 5652 bytes
SHA-256: 0217bdd016453a66cf28236a9a858977482a7a577e67396474c1d81b1aa7eb56
font_01_sfnt_off00012c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C41 11528 bytes
SHA-256: 1b848dec3bd77b60a4b99ecd7d868978e784ab416f2b99bd3d11a170088317dd

Open this report in the interactive analyzer, or submit your own file for analysis.