Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabd04e3f7cab459…

MALICIOUS

PDF

69.4 KB Created: 2021-02-03 23:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 730f9b438cb2310cc231e1ad0a9f897f SHA-1: 795e291ec13f96d1593ccd0a76438ba66710fcd6 SHA-256: dabd04e3f7cab45918f80c968a62507367ec0ed7d3f59c7f642f6f66bcf93069
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attack pattern involving directing users to potentially malicious content hosted on external domains.

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
  • 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.
  • 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://druttle.ru/123?utm_term=yu-gi-oh+nightmare+troubadour+emulator PDF link annotation
    • http://tumexade.22web.org/ba_1st_year_book_in_kannada.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/igGZic2/56692472527.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/bnmwyhc/33014045702.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/enXoibV/98759363565.pdfIn PDF document text
    • https://suzuxagutif.weebly.com/uploads/1/3/4/3/134352905/godipinufari_xikir_jebinuzewasele_xoforula.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/hjdhiVt/alarm_clock_radio_cd_player_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuxubeso.rf.gd/bajrang_dal_song_dj_2018_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/h_r_block_questions_and_answers.pdfIn PDF document text
    • http://vemesedesalo.rf.gd/grade_6_order_of_operations_free_worksheets.pdfIn PDF document text
    • http://mafifupep.epizy.com/torinegijuluvuwewasod.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/ancient_greece_map_worksheet_answers.pdfIn PDF document text
    • http://xuperag.epizy.com/relajagowaruwikekukeko.pdfIn PDF document text
    • http://pixagikaw.epizy.com/8550136944.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/getekisesigukubog.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/rang_barse_bheege_chunarwali_song_pagalworld.pdfIn PDF document text
    • http://felubumasosazi.epizy.com/tovad.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_off0000d1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F6 5192 bytes
SHA-256: 066471188ff50afd40736d21de6191dc4d02aa5c26a9038637f5bb1ee3500c9a
font_01_sfnt_off0000e378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE378 10496 bytes
SHA-256: 0d60ca5c168eba91f4229d6f79f8ecfdc47b9fb993c09b1d17e1f8343a5c871c

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