Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d568d17044a81b…

MALICIOUS

PDF

81.0 KB Created: 2021-05-29 21:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c09311cbefae9a085268ae2587ac67b8 SHA-1: 22b9de2a51f9fed4d0f6f00ee7336065200f157a SHA-256: 83d568d17044a81bb7034005cdfc5795d6a92e414e561d485524b3f09c5fe10e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous external links, suggesting a link farm or phishing attempt, with a primary malicious URL identified as https://xezojetit.ru/strik. The document body, though partially corrupted, contains a question that serves as a lure to direct users to this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://xezojetit.ru/strik?utm_term=can+i+use+my+phone+as+a+tv+remote+without+wifi PDF link annotation
    • https://fofomobagukewe.weebly.com/uploads/1/3/4/3/134352826/xiferuruxex-josinof.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/dejopurir-girukukeka-karidekazekox.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/sisixozudija_xunitowemil.pdfIn PDF document text
    • https://zatenumidepav.weebly.com/uploads/1/3/0/7/130776458/pezila-kasofap-fumepavujupixov.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/4abb588feb16.pdfIn PDF document text
    • https://folozulo.weebly.com/uploads/1/3/5/3/135351090/9845861.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/72e7baf1-89dd-41c4-afc8-d3a7d697269b/medios_de_produccion_capitalista_caracteristicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a59854-baa9-4737-9f6f-95c1fdfead01/65417375723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159f0382-e0a2-4a4c-9558-9b7e20bf2540/60992866207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7389eaf-4fa8-42b3-a7d2-45b1092c0cd0/what_are_the_two_purposes_of_sentencing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af29b61-a595-4750-972b-c06cc7990d4f/jufifopafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c694a119-29d3-47f9-88e0-a3e5851c2f41/92879088553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13dac9d3-e7bc-4e6f-9282-e768ffd8718d/vazepopefipizozeluzarin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a05d7a3c-6fd5-460f-8be0-4981bd2b0621/zorojoxabogudinosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895b7caa-af06-4b49-85ae-e5fef7eba21f/what_is_the_salary_of_a_script_writer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b6f4d2-2280-4e0b-a660-565729d33116/2005_honda_rebel_250_carburetor_rebuild_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f79913c-c7cb-4a78-b917-e072302d99e2/jabuxexonemano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481475fc-28ff-49f5-af0a-a62a138b55cf/anet_a6_printer_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e66a8bc-5eae-4866-bfa2-b4aedd0b2339/74124336997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b238f62d-ae2f-4791-b007-0950d660581d/monsters_inc_meme_sully_mmm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc0dbf7-56c1-43fe-a691-e8b7c04a1ec3/samovelob.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_off0000fdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD2 5268 bytes
SHA-256: c6292a2da02f4c42b117236ecd9d48891e7d8f8eed5951da5423c7c35445c2a4
font_01_sfnt_off00010fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAD 11444 bytes
SHA-256: 2351218f6f5d6cf80293afc52bdebe7b11128b8d0d717fa3319bc178072f85ef