Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f9bb2c1da9a6b6…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 16:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 06e2cce57d482ae252980b5ab4a1634a SHA-1: 26359e30523719604ef8575daea5a823429dc1ba SHA-256: 29f9bb2c1da9a6b6cf27f4c42a68ad353d66a9f0d791c2f57664d0f589faeb0d
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically `https://dafemum.ru/strik`. The document body, though heavily obfuscated, appears to be a lure related to 'how to change oil onan 4000'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dafemum.ru/strik?utm_term=how+to+change+oil+onan+4000 In PDF document text
    • http://roduvogixaxo.66ghz.com/vijiw.pdfIn PDF document text
    • http://m-ryanaf.site/harry_potter_and_the_half_blood_prince_chapter_1_summaryigcv7.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/how_to_shift_realities_instantly.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/magnus_effect_explained.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/rfid_based_student_attendance_management_system.pdfIn PDF document text
    • http://reduslim-eu.site/pitokirupunofanofigogo146yz.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/aetna_better_health_provider_manual_michigan.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/barzanji_free.pdfIn PDF document text
    • http://onlineeshop24.xyz/pelebakilodixajevesofurxew4r.pdfIn PDF document text
    • http://ganalozugimak.iblogger.org/biological_wastewater_treatment_series.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/data_abstraction_and_problem_solving_with_java_3rd_edition_free.pdfIn PDF document text
    • http://lopajutikog.iblogger.org/sowavidugoxunuxefaz.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/button_tag_in_html_form.pdfIn PDF document text
    • http://moxipafuxoxo.mygamesonline.org/pazozosoruvem.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/partnership_tax_return_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/35247971124.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/ccfd0e16-6f1f-4196-b349-94ef6210a61d/best_free_daily_journal_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea2a350-af10-42f8-be87-279cc40dd2ad/how_to_make_tender_deer_jerky_in_dehydrator.pdfIn PDF document text
    • http://misosemarimo.rf.gd/absa_app_for_iphone.pdfIn PDF document text
    • http://vefodipox.myartsonline.com/23366503881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee8a078-f7a3-4234-9d45-8bb0b393a846/is_little_fires_everywhere_based_on_the_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8911c0c6-005e-4acd-97a2-c06ead84d439/zakinujekowu.pdfIn PDF document text
    • http://sukufitax.epizy.com/what_is_a_greenery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b192ae13-64e4-47cf-8aa7-5bfc5b08da84/bazajami.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_off0000ec1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 5072 bytes
SHA-256: 379c5c53518d5c301eb7c3b6f7d8923b3c410332fc31b075abab98f5adccd603
font_01_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 11288 bytes
SHA-256: 1ea2c3bb5a931741c96dc7a98abb05faf119a049d8a508ce71d84d6535310bd0