Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0db149edb08d320…

MALICIOUS

PDF

80.4 KB Created: 2021-04-18 10:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 18b68b3af4d16bde075d42b88c45ea91 SHA-1: 745561ca71817ec49faac07e511c23c459631d4a SHA-256: a0db149edb08d320a42b9f94a01499cfdc52cd35ba4d9bb5cdafde63920106ca
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 0.9964

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://lozipotod.ru/strik?utm_term=calories+in+bojangles+homestyle+chicken+tenders PDF link annotation
    • http://lovemecompletely.com/html5_viewer_w3schoolsww7o3.pdfIn PDF document text
    • http://giwudogor.scienceontheweb.net/72431488443.pdfIn PDF document text
    • http://forpost-electrica.ru/57950246641tq7tk.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/74243261649.pdfIn PDF document text
    • http://cookwellbakewell.com/tiktok_news_band8ec57.pdfIn PDF document text
    • http://voduvalegef.66ghz.com/mavobap.pdfIn PDF document text
    • http://dombitarf.ru/fakenoderovomewolisug0hp8.pdfIn PDF document text
    • http://wobafobigo.mywebcommunity.org/97801555281.pdfIn PDF document text
    • http://dufigep.scienceontheweb.net/international_journal_of_contemporary_hospitality_management_impact_factor.pdfIn PDF document text
    • http://profoto22.ru/xisovikovirzo631.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/84647238541.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/94978399216.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/ib_november_2018_exam_schedule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozefemalevarug.rf.gd/95015117260.pdfIn PDF document text
    • https://d4e73f68-9870-4c81-be0c-0a6dd7607cd2.filesusr.com/ugd/6f53d7_ba759b7874bf44bebd04a07bb7c17b7b.pdf?index=trueIn PDF document text
    • http://gekolutewubel.myartsonline.com/tefowadufunepegibalepid.pdfIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_708a70f18ea24e6d987c3c25a7d635cd.pdf?index=trueIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_dc06840acefb4843819f4a1dd225dd7d.pdf?index=trueIn PDF document text
    • http://juvegebufu.epizy.com/bursary_motivation_letter_template.pdfIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_f49ede8a889e462b971b653faa38dce9.pdf?index=trueIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/27176082085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45453c1-2c08-4139-a763-f8532d746ced/thank_you_mom_quotes_from_daughter.pdfIn PDF document text
    • http://rutenodisekorin.rf.gd/travel_itinerary_planner_template_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0144d5d0-3bb2-40dd-887d-e9c162bd00da/3rd_grade_compare_and_contrast_essay_examples.pdfIn PDF document text
    • http://xasejumav.onlinewebshop.net/brassed_off_play_script.pdfIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_e0b9f2603cc64e0d8bb1b039a3f8638a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/59fe5e51-8781-41ec-8767-fe328762d0c0/what_is_a_genre_theory.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_off0000fb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB44 5640 bytes
SHA-256: edbb4154854668a22f25f0044850a2768ea4bbe0c7c6b16b4da56bb418c723d7
font_01_sfnt_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 10916 bytes
SHA-256: f30f33fce4fa96d70b85384f63ede751c64d63fe37fa2b77a57a163eaee707e8