Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3fb85397cf67bd5…

MALICIOUS

PDF

75.0 KB Created: 2021-03-16 23:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4f6b654d548a4ae03719dfc179422e81 SHA-1: 53cb520f0f62590b410defd3c87916f0b63d84c5 SHA-256: a3fb85397cf67bd50e04efe983bf42f491eca47ed1385d251d1695a6534c906f
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 0.9992

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://mezovuduw.ru/strik?utm_term=rascal+veo+mobility+scooter+batteries PDF link annotation
    • http://zenarajare.22web.org/fubetat.pdfIn PDF document text
    • http://xulenegutuwovi.iblogger.org/sewesoza.pdfIn PDF document text
    • http://wamawebikojas.22web.org/what_purpose_does_the_mechanical_clock.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/what_happened_with_marbury_vs_madisonb0vg5.pdfIn PDF document text
    • http://bigops.fun/how_to_make_an_origami_crane_with_square_papericj8v.pdfIn PDF document text
    • http://jinokonur.22web.org/tcs_ninja_aptitude_questions_and_answers.pdfIn PDF document text
    • http://winoorama.site/80981988304mqktl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gelutosedufom.epizy.com/lesson_2_classifying_matter_answers.pdfIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_8068176e75244808a83b2c2a64d1e883.pdf?index=trueIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_800e7033ebcf4208a89bceef88717fe9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44c5c62-0e78-48d6-b2e0-6f0d8246c826/98502807694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6a36ae-25cf-4948-9177-81c250f5643d/girl_from_ipanema_chord_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac52116-b9db-476c-b7f4-223f4ebbdc63/how_to_throw_out_old_clothes.pdfIn PDF document text
    • http://wabiredozu.rf.gd/liwenome.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_f1aa0dbdb6404040a92907fd531453a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5d07fe-cc3d-4d52-9348-2d6bda55f376/how_to_find_wps_pin_on_dlink_router.pdfIn PDF document text
    • https://c2963e02-5f2a-49ff-bb4d-22715b80ab3a.filesusr.com/ugd/55efe4_60e813f3b66c4c97b825078c9782223a.pdf?index=trueIn PDF document text
    • http://pidosowot.epizy.com/dyson_v7_user_manual.pdfIn PDF document text
    • http://jegowijuvu.epizy.com/intercompany_services_agreement_template.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_10e7b1592f784fcd8eb69f8a84fc9909.pdf?index=trueIn PDF document text
    • http://mejitakofiragi.epizy.com/guide_book_publishing_mo.pdfIn PDF document text
    • http://vaxinot.epizy.com/que_titulo_necesito_para_abrir_un_taller_mecanico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c543cd2-145c-4079-ba5e-a27a82991d1e/gimufugugutowe.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_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 5252 bytes
SHA-256: bd2859935cbc0e86e96a2d3628426dac8ba8dd498bf9502cee60f01818aecf06
font_01_sfnt_off0000f621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF621 11104 bytes
SHA-256: 4ceaa0a744a42f79f817ef7f74e59e1ffb769273a049cd2def877860a1fcc171

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