Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd072b7279c8dd4…

MALICIOUS

PDF

82.9 KB Created: 2021-05-15 19:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 20f2ef72e2674e975fe76afdb5a09154 SHA-1: e79f091e022a04a051987afeaee5f81393f92067 SHA-256: ecd072b7279c8dd44684cc5827b7cf06b1ece648cfcbd2189ab670a41cd3a69f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking documents, but one is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic for a link farm suggest the primary goal is to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=how+to+change+battery+in+acurite+meat+thermometer PDF link annotation
    • https://cdn.sqhk.co/tarudifirew/22heoCc/49977930396.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/gRT5MaN/bodo_romantic_song_free.pdfIn PDF document text
    • http://kyrgyztours.com/rotawobojipope5ii.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/gQjgeih/87861014599.pdfIn PDF document text
    • https://panikudar.weebly.com/uploads/1/3/1/4/131437701/samisivefi.pdfIn PDF document text
    • http://nat-yoga.space/9133583890537965.pdfIn PDF document text
    • http://4gusevshop.website/jaxuxoxadajevogokes10e8s.pdfIn PDF document text
    • http://mihetos.xyz/saitek_x52_flight_control_systemllqnq.pdfIn PDF document text
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/pifibupemusisifola.pdfIn PDF document text
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/d956c76f47.pdfIn PDF document text
    • https://visimekariluvog.weebly.com/uploads/1/3/1/4/131483525/7358402.pdfIn PDF document text
    • https://cdn.sqhk.co/wanowofimaz/chgiaHk/24721948486.pdfIn PDF document text
    • https://nitevafatuva.weebly.com/uploads/1/3/4/8/134872456/1139738.pdfIn PDF document text
    • http://nncucuucuc.space/restaurant_formosa_argentina_amsterdam8yxyc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/que_representa_el_escudo_de_la_bandera_de_costa_rica.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/project_scope_statement_sample_pmbok.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/74309955354.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/tolawonazakibevoriwirodap.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/buxasit.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/61187623208.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/the_mystery_of_capital_hernando_de_soto.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/forcepoint_casb_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/dialectical_behavior_therapy_workbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/complex_sentence_worksheet_9th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/hallelujah_pentatonix_sheet_music_satb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 5180 bytes
SHA-256: 8fc56da713ce79f999999fcd109d117e0701c3396e781e76ac5761a8e3ad6c42
font_01_sfnt_off00010b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B95 10524 bytes
SHA-256: cd4779e25a80cf426347428bfa72ea7267e5d9fb37810b2a8f90873cff2825f1
font_02_sfnt_off00012fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.