Malicious PDF — malware analysis report

Static analysis result for SHA-256 26dc7c67bcb61033…

MALICIOUS

PDF

83.4 KB Created: 2021-05-08 14:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b20a4ffe7f9a99ab34eaa02f0197f065 SHA-1: 2c081f5547222b003c5b7e76a2fd777d9b70582c SHA-256: 26dc7c67bcb61033b1a70cb33805c000cfff1e68112d9dd3e06eba4171532cfd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of embedded links pointing to various domains, many of which are hosted on disposable or suspicious infrastructure, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains a title related to 'Badger garbage disposal' which may serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://jottigo.ru/strik?utm_term=badger+garbage+disposal+leaking+from+power+cord PDF link annotation
    • https://cdn.sqhk.co/wijelukifap/fieB0gh/32836951266.pdfIn PDF document text
    • http://xotizel.iblogger.org/65138122299.pdfIn PDF document text
    • https://cdn.sqhk.co/dowivita/mNOcGhC/xipetiderefakamemazezaju.pdfIn PDF document text
    • https://cdn.sqhk.co/mapibeze/sHM7ib2/rilakivuja.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/Mgcic0m/24296458979.pdfIn PDF document text
    • http://lozosomegav.iblogger.org/67160752526.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/hdifjjU/healthy_snacks_recipes.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/what_is_an_example_of_color_constancy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lavowatovodab.rf.gd/32048371027.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_9ce23995fa854afca4b56f5723d13ce3.pdf?index=trueIn PDF document text
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_ee0c63a7faf94919ab883a3f73c41ade.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bcf855d-148f-415f-ab3a-a9567ee7aad6/how_good_is_mba_in_operations_management.pdfIn PDF document text
    • https://ececae0b-1312-4a4c-959a-117928b3d478.filesusr.com/ugd/e6721e_f68cf383b2714cd180be7d14fcbb6dd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9001010b-c707-4c8c-b329-1b432c337c53/jepiroluwukewaninetejeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd0cc09-5fe7-4ebb-974d-73a5de79c802/the_magic_school_bus_books_genre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9921d2c2-ca08-43da-8d0c-1aa8345b1634/morunalisiresaxonarami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc2e086-ea46-409a-aae4-031df7675059/40529267714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e45cf6-50ed-434d-8978-29b2ced7248a/dulumolazarugunolivagaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d021bf-21bc-470b-9424-f8b5870ac42a/public_relations_manager_job.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/006a56b7-31f9-4101-88fc-914ea339ce4c/are_saltless_water_softeners_good.pdfIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_17496db13f8249cd8ad8ac36cdb1fdcc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee59fed-5ff1-4ed5-8133-0bb250a6fe30/78420792307.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93F 5528 bytes
SHA-256: f53caf351296efbe7e6a342d8249aab7e4be23835f5e056c313b9ddbc269b0cf
font_01_sfnt_off00010bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF5 10820 bytes
SHA-256: 71fa7eb2ae2563c3b40652a2e4dc4349a3bdaaaa3eb3e4f58eac957870eb9218
font_02_sfnt_off00013110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13110 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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