Malicious PDF — malware analysis report

Static analysis result for SHA-256 8698dd36da872ec7…

MALICIOUS

PDF

72.8 KB Created: 2021-03-14 21:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 971b3f497fe51adad6854f2d04789b8c SHA-1: 5d058f468c94b27a6b7f322f24490df2eddd41f3 SHA-256: 8698dd36da872ec720fb3f208305789a15f733a93fc4a6358962f5f73e50cf5f
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 0.9997

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://soxebez.ru/strik?utm_term=d-link+dsl-2750b+access+point PDF link annotation
    • http://pizuwujigajanen.medianewsonline.com/acta_constitutiva_asociacion_civil_mexico.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/23538040573.pdfIn PDF document text
    • http://bukapim.mywebcommunity.org/dia_de_la_constitucion_mexicana_para_preescolar.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/25032840404.pdfIn PDF document text
    • http://nikibolerobika.getenjoyment.net/outlook_365_not_opening_attachments.pdfIn PDF document text
    • http://lulizukudomiz.scienceontheweb.net/xevabavurexatolite.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/canada_map_assignment.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/kakorivubefebok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/4351878184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0391ebfe-d3f4-4d06-a288-a19451d0b323/how_to_write_a_danger_statement_signs_of_safety.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59bb1ac-c676-4813-a5fc-d546f92bb197/gesutepujotoworigaj.pdfIn PDF document text
    • http://wuxigukupem.epizy.com/daubert_guidelines_computer_forensics.pdfIn PDF document text
    • http://xekipeme.rf.gd/zimek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9ce926-675c-4c70-9301-ddbd1dcc7eec/where_to_bring_clothing_donations_during_covid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c4eba1-834e-49bd-90c2-77d1acb6690a/what_is_the_order_for_order_of_operations_in_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf21093-b6fa-42b8-a830-d754f7325faf/how_many_calories_in_6_slices_of_dominos_pizza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65716cde-eb72-4936-8052-49ff97ddfb1a/20696581006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c787693d-97ee-4165-9806-1624de989c01/jibabewakusewazugevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/669452aa-3a77-4b91-b63a-5cfe8f7cc53b/88923907105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/957c5d1d-f4c6-4905-a083-ea70b6734c9e/99879254539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f71133e-4cb7-47d4-8d84-aba80beab56f/72193387429.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_off0000dcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEE 5684 bytes
SHA-256: 74814886cf21adfe79f478d7f1de881e209a13744347b626afcb7b518f37d4af
font_01_sfnt_off0000f06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 11020 bytes
SHA-256: 7c9eeefecfcfef69bb2bfde8f9480688cc8306155670178c6fd6742669a181a7

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