Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06b36fd06acccb2…

MALICIOUS

PDF

75.7 KB Created: 2021-03-31 21:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd9a87c59579ec6cba91ac89ab4d5ed8 SHA-1: 97df2aedc8a957169bf361711edd5912cbc29d0b SHA-256: a06b36fd06acccb215570dfb0a9e97e99f29b1dc3232d58a9b0064f05f93e3ef
126 Risk Score

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 0.9996

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 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://kuzutuzo.ru/strik?utm_term=dapple+dachshund+blue+eyes+puppies+for+sale PDF link annotation
    • http://form-copyrightservices.com/website_evaluation_criteria_checklist3l8k0.pdfIn PDF document text
    • http://xumimoz.22web.org/genetic_code_chart.pdfIn PDF document text
    • http://lighterusb24.site/cajas_de_carton_bookm2434.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/hdCmJ21/double_discounts_worksheet_answer_key.pdfIn PDF document text
    • http://zeropium.com/android_api_versions_wikishfpp.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/rgiWgf5/youtooz_mrbeast_chandler.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/gjgf3ja/72141302701.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/idjjslY/nibug.pdfIn PDF document text
    • http://delabozaxexiris.getenjoyment.net/dubaxi.pdfIn PDF document text
    • http://fitokapss.xyz/parts_of_speech_notes89577.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/1Nij427/lazojujawamofipog.pdfIn PDF document text
    • http://leoidet.xyz/how_to_fix_a_broken_snark_tunerp2xay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_2f74d9475fbf45c6add4b1f1225a1681.pdf?index=trueIn PDF document text
    • http://fefekug.rf.gd/metodos_de_investigacion_en_psicologia_clinica.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_8fcc8cc3a7494120a0857a621df21d04.pdf?index=trueIn PDF document text
    • http://rovujanoro.epizy.com/wave_accounting_tutorial.pdfIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_3ad1fd6104d948b195dd475628de4bc9.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_bca1fe98ec1e4cf4813e7c761e997ade.pdf?index=trueIn PDF document text
    • http://jufogitomob.onlinewebshop.net/british_english_grammar_tenses.pdfIn PDF document text
    • http://sijomowekiri.epizy.com/kenadazub.pdfIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_f82ba8da9825446287718cfa48a13a6d.pdf?index=trueIn PDF document text
    • http://zivuneko.epizy.com/jai_bajrangbali_wallpaper_hd.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_off0000eab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 5484 bytes
SHA-256: 499bc9653cb347d60dfabe895f08dc203626cc0aacf194c6c479049bfd3840a2
font_01_sfnt_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 10476 bytes
SHA-256: 6d3a1493dfba8647ba9bdf52a6c1eb800e4d1bd7af9d88b1b186ef4cd69ef5f3

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