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)
MD5: 06e2cce57d482ae252980b5ab4a1634a SHA-1: 26359e30523719604ef8575daea5a823429dc1ba SHA-256: 29f9bb2c1da9a6b6cf27f4c42a68ad353d66a9f0d791c2f57664d0f589faeb0d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'how to change oil onan 4000'. No scripts were extracted, but the presence of external URIs and the overall malicious classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://dafemum.ru/strik?utm_term=how+to+change+oil+onan+4000
    • http://roduvogixaxo.66ghz.com/vijiw.pdf
    • http://m-ryanaf.site/harry_potter_and_the_half_blood_prince_chapter_1_summaryigcv7.pdf
    • http://lilubaxubaxulu.sportsontheweb.net/magnus_effect_explained.pdf
    • http://lupelisizi.medianewsonline.com/rfid_based_student_attendance_management_system.pdf
    • http://reduslim-eu.site/pitokirupunofanofigogo146yz.pdf
    • http://onlineeshop24.xyz/pelebakilodixajevesofurxew4r.pdf
    • http://ganalozugimak.iblogger.org/biological_wastewater_treatment_series.pdf
    • http://lopajutikog.iblogger.org/sowavidugoxunuxefaz.pdf
    • http://moxipafuxoxo.mygamesonline.org/pazozosoruvem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ccfd0e16-6f1f-4196-b349-94ef6210a61d/best_free_daily_journal_ios.pdf
    • https://s3.amazonaws.com/veledabejufi/how_to_shift_realities_instantly.pdf
    • https://uploads.strikinglycdn.com/files/4ea2a350-af10-42f8-be87-279cc40dd2ad/how_to_make_tender_deer_jerky_in_dehydrator.pdf
    • http://misosemarimo.rf.gd/absa_app_for_iphone.pdf
    • http://vefodipox.myartsonline.com/23366503881.pdf
    • https://s3.amazonaws.com/xisefowu/aetna_better_health_provider_manual_michigan.pdf
    • https://s3.amazonaws.com/legenapi/barzanji_free.pdf
    • https://uploads.strikinglycdn.com/files/8ee8a078-f7a3-4234-9d45-8bb0b393a846/is_little_fires_everywhere_based_on_the_book.pdf
    • https://uploads.strikinglycdn.com/files/8911c0c6-005e-4acd-97a2-c06ead84d439/zakinujekowu.pdf
    • https://s3.amazonaws.com/xalexojaxipud/data_abstraction_and_problem_solving_with_java_3rd_edition_free.pdf
    • http://sukufitax.epizy.com/what_is_a_greenery.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/button_tag_in_html_form.pdf
    • https://s3.amazonaws.com/jalasilunaz/partnership_tax_return_guide_2019.pdf
    • https://s3.amazonaws.com/bofake/35247971124.pdf
    • https://uploads.strikinglycdn.com/files/b192ae13-64e4-47cf-8aa7-5bfc5b08da84/bazajami.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1c.bin
379c5c53518d5c301eb7c3b6f7d8923b3c410332fc31b075abab98f5adccd603		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 5072 bytes
font_01_sfnt_off0000fd7a.bin
1ea2c3bb5a931741c96dc7a98abb05faf119a049d8a508ce71d84d6535310bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 11288 bytes

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