Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9a7bcaa9bc6f10…

MALICIOUS

PDF

77.0 KB Created: 2021-04-03 09:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 60e22eec2acb5ba7b3ac772840876386 SHA-1: e89752af3c4e549ac1894453101cfdbac1f7a36e SHA-256: 2d9a7bcaa9bc6f10815668a7f37423f37b5e0028d9e1bc3d0541b4cd0244b890
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing and SEO link farm schemes. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure suggest the document is designed to redirect users to potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=preguntas+y+respuestas+de+borges+y+yo PDF link annotation
    • http://nevinidonet.mywebcommunity.org/39119863628.pdfIn PDF document text
    • http://tefosewun.22web.org/beste_spectrum_analyzer_app_android.pdfIn PDF document text
    • http://refesuf.22web.org/47064065020.pdfIn PDF document text
    • http://narawodosure.medianewsonline.com/blow_moulding_design_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buvuvutokitiz.epizy.com/hemoptysis_approach.pdfIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_d7779ba8eef84d8d8cbb49bcd83f3fdf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/world_war_z_2021_game.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/50385055784.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/how_to_use_geometric_series_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/how_to_learn_guitar_book_.pdf.pdfIn PDF document text
    • http://figewujupoj.rf.gd/14911924207.pdfIn PDF document text
    • http://xewebumobodoris.rf.gd/ends_based_thinking.pdfIn PDF document text
    • http://girifej.epizy.com/roman_breviary_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/5_paragraph_essay_graphic_organizer_4th_grade.pdfIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_2eac49334e4344c093693cae815ae7f1.pdf?index=trueIn PDF document text
    • http://pusevim.epizy.com/what_a_scanner_darkly_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/jovuwigoduzededufop.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/23479246207.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/90010101489.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/baby_doll_sambalpuri_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/fasikotajenipozupibajito.pdfIn PDF document text
    • http://wenibeliso.atwebpages.com/ccna_2_download.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_off0000ec1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1F 5340 bytes
SHA-256: bf74adb9403984d6f0672808427da323d45ef95aaa7bf3aa47c000e4ace50651
font_01_sfnt_off0000fe56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 11968 bytes
SHA-256: efa5066b8429db08649b9d9e447bb906b4782d674909524f5e62d32b12baf76e

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