Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e286908d8a78032…

MALICIOUS

PDF

74.5 KB Created: 2021-03-16 23:22:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 78ad02f7ba465e5cdcbd1f0ea7361420 SHA-1: 56e38cc4c3c1b3efe77860336b29951318299e13 SHA-256: 2e286908d8a78032df1adff4ac717347027d12ec85187e4f58f4d76407b7fe03
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 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/wix?keyword=4.2.4.4+packet+tracer+answers PDF link annotation
    • http://hiziryigit.online/how_to_install_officejet_pro_8600036q3.pdfIn PDF document text
    • http://mon-cmbretagne.com/job_description_of_restaurant_general_manageroc91r.pdfIn PDF document text
    • http://opencabinets.xyz/taylor_scale_walmart_batteryccizx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/gotasilemo.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_9c4c2e3e6e8c48149f06263f06c6aaaf.pdf?index=trueIn PDF document text
    • http://setevibebevu.epizy.com/42420790187.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/56803117716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b997e643-e16d-4724-9319-df87a5ae07b0/5_steps_to_a_5_ap_calculus_ab_2020.pdfIn PDF document text
    • http://vabizofolimise.epizy.com/chemistry_unit_4_intermolecular_forces_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9875c348-11ab-4fe8-b200-696ebe682afe/fadas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad62cba4-6406-4641-b99c-8e987f524646/what_psat_score_is_national_merit_2023.pdfIn PDF document text
    • http://kisolapuri.rf.gd/cassowary_coast_regional_council_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2b7420-ec4d-4751-85c9-2ac20b6d1ed1/guwidusawapenujijamiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/xetiwisudedinofavovas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/059ed67f-de1a-44ac-a974-20a31b330697/wizard_of_oz_ype_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa649d76-11da-4c99-bdd8-709e0e1a5e2e/lg_direct_drive_true_balance_washing_machine_error_codes.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_11926f504cbd480ba9b61e6559f71b66.pdf?index=trueIn PDF document text
    • https://a29d81ee-e589-4368-99bd-4e0be04eb4c0.filesusr.com/ugd/a89e6e_de2462ca29d645f681c1c80afc49a663.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c118f01-8c05-4366-b08e-04b946abff30/the_mysterious_benedict_society_book_1.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/beyond_compare_plugin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20b6c74-ca50-498b-9110-455c778e8767/estudio_del_trabajo_1_unidad_4_estudio_de_tiempos_con_cronometro.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_off0000e752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE752 5208 bytes
SHA-256: b2b6aa30c8d48cdb125956e3b53cad71326c2819b12799e69942d7dc845b2f8e
font_01_sfnt_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 10324 bytes
SHA-256: fb8d5308dd5bb6b493bac9dae88d780c23ead2833cdea41b7b368903bcda8e36