Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ed42a5885a886a…

MALICIOUS

PDF

76.0 KB Created: 2021-03-26 04:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c72e83c3b42531271030afd95165cf4c SHA-1: 6a23e77b1743d6e04b802f92107ab94313e49d64 SHA-256: c2ed42a5885a886a9b05fd1cdd80b33dd2cb8a7c212332fa73dc575b55ff1296
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://jumiwimov.ru/award?keyword=mass+general+anesthesia+pdf PDF link annotation
    • http://grandov.pro/logitech_mk330_klavye_driver1dblh.pdfIn PDF document text
    • http://badge-verification-center.com/ff_live_streaming_hari_ini_sctvhz42j.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/vgeENhd/xakupafoj.pdfIn PDF document text
    • http://menbp.online/programming_nodemcu_using_arduino_iden0z3p.pdfIn PDF document text
    • http://garantiya62.ru/dragons_of_autumn_twilight_mapspeds.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/ajdjhPD/3d_pinball_space_cadet_para_android.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/jg1wDut/zunofaretijejadopemu.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/dell_optiplex_gx620_max_ram3302n.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/jnpVNxT/flip_flops_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/gg7hahh/55355919225.pdfIn PDF document text
    • http://ryukzak.digital/mumobsh97e.pdfIn PDF document text
    • http://lisolu.org/80913465505y615l.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/nhijhgc/wimojirefona.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/6e449c55-9236-4833-957f-cdbf42006830/dafev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85bae96a-befc-4845-8815-4aa3925ab644/86512687108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bb7944-5dd7-4e39-9859-5cbbd979a1b2/nemidozeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a400188f-ee0c-441d-a3d2-d284dc25f325/81212227631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/692a7213-edd6-49d8-9c79-1ed14898401c/89119427548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76898693-dc13-4f1f-8341-4ae5c12bb50f/21101315778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55a8d5e5-43d5-4ca7-9e7b-66fabae4715e/wordly_wise_3000_book_3_lesson_4_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94681cbc-fefd-4777-8c60-45095d7ac74e/fujitsu_scansnap_s1500m_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f2e75d-6669-4721-84e3-996d17486656/reading_comprehension_worksheets_6th_grade.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_off0000eca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 5308 bytes
SHA-256: 4131ef1df13fcad2ad28bab238d8e9cb50e73a1e4d048d6ca2fb424911c9290b
font_01_sfnt_off0000feb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB1 11112 bytes
SHA-256: d7c9b1b2d2c67921cb4090f9faa2edd5a387e816b7b54f9f674cb5e574407a04

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