Malicious PDF — malware analysis report

Static analysis result for SHA-256 a131a11834a57759…

MALICIOUS

PDF

84.5 KB Created: 2021-04-21 23:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e003030c69c5df8b7c4891d649965958 SHA-1: 70f45392d534ef62dc1229dd08ab7a05321beb17 SHA-256: a131a11834a577590f483c31b8faa9cadb88e7b81eac349cd7f87f6ca4098e51
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 'bologen.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to software installation, aligning with the phishing nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=how+to+use+wix+installer PDF link annotation
    • http://zugemenelil.medianewsonline.com/sony_acid_pro_7_keygen_authentication_code.pdfIn PDF document text
    • http://xunajoza.22web.org/88554239004.pdfIn PDF document text
    • http://lafovawolifi.22web.org/76959470180.pdfIn PDF document text
    • http://bewujasixi.mywebcommunity.org/tisev.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/66341264540.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/kefowivebogufi.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/fomaralunex/harga_casio_g-shock_ga-1100-1a3dr.pdfIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/dovitaluwepu.pdfIn PDF document text
    • http://megoger.rf.gd/refojod.pdfIn PDF document text
    • http://xaviwawav.epizy.com/flyff_elementor_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/submit_button_form_onclick_javascript.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/hd_bollywood_movie_site_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835bdfa4-4171-48b0-92cf-a1562f410147/simcity_4_mods_how_to_install.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/palmistry_in_urdu_book_free_download.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/rolibokedawidavizoja.pdfIn PDF document text
    • http://vinixozu.rf.gd/varexokalamipobesovevude.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/97272809834.pdfIn PDF document text
    • http://benepiro.rf.gd/the_architecture_of_happiness_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5c10d1-e760-4fb1-a2a1-ddca2dd1ad8d/hotel_new_yorker_new_york_tesla.pdfIn PDF document text
    • http://nadadeze.epizy.com/3645794404.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/muzafirovusakefofa.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/just_2_words_puzzle_1019_answer.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_off00010da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA8 4800 bytes
SHA-256: 85702650c2697c32240ab61d1aede95deb2afe824fa6e5da4d0bce19901fad5a
font_01_sfnt_off00011e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 10724 bytes
SHA-256: 8f5375d0d8e1e9e15547b5c9bf47c7252e00cdb313b1a32cd992a87e6f5937da

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