Malicious PDF — malware analysis report

Static analysis result for SHA-256 2699ddab46c4bb10…

MALICIOUS

PDF

84.5 KB Created: 2021-04-06 14:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0f382fc124f9f4a8692ab0cba078284 SHA-1: aa9bdcba11f738a87058fa68b053333f5e16352d SHA-256: 2699ddab46c4bb10dbada062281e1caec31027f31828ff7717f9f7e73a63d0cb
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/123?utm_term=horizon+zero+dawn+ps4+theme PDF link annotation
    • http://sigefolaxapuve.22web.org/34354182218.pdfIn PDF document text
    • http://smartroom.pro/gusewoduratatabilumev4aknz.pdfIn PDF document text
    • https://jevizaja.weebly.com/uploads/1/3/4/8/134869407/vukedudi-bonisopatiti-munatojonetax.pdfIn PDF document text
    • https://fadurobudafeme.weebly.com/uploads/1/3/5/9/135959894/5170479.pdfIn PDF document text
    • http://znasila.ru/74527062682efsbu.pdfIn PDF document text
    • http://vewikimeno.22web.org/somewhere_over_the_rainbow_judy_garland_ukulele_chords.pdfIn PDF document text
    • https://gokuxevi.weebly.com/uploads/1/3/4/0/134017514/tifuzulojowudog.pdfIn PDF document text
    • http://groby-ritual.online/thesis_acknowledgement_supervisorb5ood.pdfIn PDF document text
    • http://fovagenifozemub.iblogger.org/nimaxovunoxedelifafepowu.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/c57fe108-e694-47d3-bc7c-25ffae6cf2e1/biponagozema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b3b190-b5c9-4024-aa90-ad92e43d5592/how_to_find_sum_of_interior_angles_of_a_polygon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8daf03c8-9448-447d-99ad-dfd4efa66da7/11644302129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ea55ce-8a0d-4fee-b49a-dc5f35c0381f/will_ff7_be_on_ps5.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/ecocardiografia_transesofagica.pdfIn PDF document text
    • http://vobununebufipu.rf.gd/buat_duit_dengan_shopee.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/classroom_debate_format.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/what_are_fedex_hours_today.pdfIn PDF document text
    • http://velumosak.epizy.com/gafuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b388c88-fc27-4108-9e30-59540f56952d/powerblock_pro_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b70c464-9e5c-43ef-bee9-fe47b42c6a48/54484397710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5790a0-96f2-45e8-a1eb-1a4628e5b166/nezugukusezigiximupu.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/abc_letter_tracing_worksheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/fukajokodafafududitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4bf2e4-9b63-42d8-a37a-fcee7ef7b274/grammar_practice_workbook_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d04a2c5c-6aeb-47d3-b101-ec2fcb99064e/why_is_call_me_by_your_name_removed_from_netflix.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_off00010b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9B 5360 bytes
SHA-256: 7e317604c6d8045706fadfbf1651b3ed68ec8fea7be82dcd65d2b67e89b69e43
font_01_sfnt_off00011dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC7 11452 bytes
SHA-256: 8cff2150615b6be13f8078c24081d2ccdfac51ae16b04e7b99c52c80073924f1