Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98867798f297308…

MALICIOUS

PDF

114.2 KB Created: 2021-04-27 02:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6f70ac957de672571dfdc594ccf9b1b6 SHA-1: 26bbbc138b295d0cdf8df608b99989ed20379719 SHA-256: b98867798f297308502b89abd69256a82bf056d20ecd6ab9dbfce1d64e8edb3d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many of which are to potentially malicious domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to reference search terms for a book, likely a lure to direct users to malicious websites.

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://nipisod.ru/strik?utm_term=charles+dickens+a+christmas+carol+online+book PDF link annotation
    • https://tidekomix.weebly.com/uploads/1/3/4/4/134441433/jubanibukelawi-zajid.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/gamexamemoxuxe.pdfIn PDF document text
    • https://kuwovuvonix.weebly.com/uploads/1/3/5/9/135971109/4645535.pdfIn PDF document text
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/wanagoredifefog-popik-mazesuminetak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/37538f52-6c90-4e5d-b3d4-352aecc04bdb/which_strand_of_dna_is_the_longest.pdfIn PDF document text
    • http://kozibitoj.epizy.com/parasitic_diseases_in_fish.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/lerogazu.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_19799a72cca942b4aac526492ab6747f.pdf?index=trueIn PDF document text
    • http://vegobojogaroju.rf.gd/nulanena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a3d89e-2ec0-485d-8bfd-e9277a66aeed/what_are_the_theories_of_justice.pdfIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_5fe9e477f2e44045b2141d6e0ab7dda8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefadep/how_to_replace_timer_on_maytag_centennial_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/11840261281.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/noam_chomsky_who_rules_the_world_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd209197-2858-42c8-b97f-dbd66cbf7d03/oedipus_the_king_unit_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/dagotuvu.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_6e9bca8edb5c48f69984287435aaf30b.pdf?index=trueIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_8ecb3306f1af490693378930feba8d6d.pdf?index=trueIn 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_off00018371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18371 5288 bytes
SHA-256: dc4add9c6ed686015650f2d94b8d388aa9a413784699a3b97fad016c373ab930
font_01_sfnt_off00019536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19536 11344 bytes
SHA-256: 128c4549c6fe16ab5d21716c3c0b30b185e46ab8eeb4ddaaa6a192767d44bd20

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