Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6ff22ec31cafc9…

MALICIOUS

PDF

68.1 KB Created: 2021-06-10 16:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 81709be3ef42cdcd05b183681e0edc79 SHA-1: c45bb6ef1321b32f650412160c507f9524ff5d33 SHA-256: 3c6ff22ec31cafc95fe45e71dcf8a2ede4fe8a2d0803b3528389b95dcb36f711
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous external URIs, with a primary suspicious URL pointing to 'garglob.ru'. The document's structure and the presence of many links suggest an attempt to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://garglob.ru/pbw?utm_term=png+images+background+hd PDF link annotation
    • https://gifuliranofave.weebly.com/uploads/1/3/0/8/130873810/murezijazevazunivam.pdfIn PDF document text
    • https://rawabibag.weebly.com/uploads/1/3/4/8/134870232/1519889.pdfIn PDF document text
    • https://mawebugejememed.weebly.com/uploads/1/3/4/5/134599942/tixipem_muwenadona.pdfIn PDF document text
    • https://jasugigikimodo.weebly.com/uploads/1/3/1/3/131383258/joxumixisura.pdfIn PDF document text
    • https://dinijituwit.weebly.com/uploads/1/3/1/6/131606252/nagifolujusafidizate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c86870-15ec-453e-aab0-00903b488da7/26062261777.pdfIn PDF document text
    • http://jotuwufo.pbworks.com/w/file/fetch/145053330/64551076777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44bd2c65-46b8-45bd-a2cd-817cc3959eeb/4300519017.pdfIn PDF document text
    • http://pobonagul.pbworks.com/w/file/fetch/144456315/kimat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d3defc8-2669-4499-95a5-6cd24499de17/behringer_xenyx_x1204usb_driver_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac4ba63-eb84-4990-8859-aba30814953c/what_occurs_at_the_anode_of_a_galvanic_cell_apex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd12c75-349b-4620-bb81-f3430463d199/amendments_to_federal_rules_of_civil_procedure_2018.pdfIn PDF document text
    • http://kigiputilik.pbworks.com/f/what_channel_is_lmn_on_spectrum_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3df3b2f-1538-4e5f-961b-dd3ae5172d6f/notas_para_tocar_en_piano_la_cancion_de_titanic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429587dc-83cd-4ecf-b46c-6bfb09fdaaaa/kovawulavigadopaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8527ec1-7fdb-4883-967f-726d8883c514/rambo_5_pelicula_completa_en_espaol_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fb5f77-f2f9-47be-8ba7-6898d5f492e5/cunto_es_150_gramos_en_una_taza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942e82fc-5cc0-408d-a82f-5676c0005199/94456870545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6753412f-bd27-48f3-808f-2332dcbb5204/95374336331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0a6883-9b88-4085-9325-0e00e4810569/what_is_the_aboriginal_religion_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ffe354-fd0e-4599-9cb5-55693c4acfd8/95695349792.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_off0000cf73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF73 5528 bytes
SHA-256: 6af4ea06124a824bd9acd0091387d9975e8b71c0cf1fcc7007a2a9696ba19d5a
font_01_sfnt_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 9888 bytes
SHA-256: 9abe7b4cffd7cce7ea27587a5a19bee7f75ae5d7483ee82ff8a79b38ff1c231e