Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1f50beea619947…

MALICIOUS

PDF

70.1 KB Created: 2021-03-05 09:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: beda132fc86736e702022587e6c21fd6 SHA-1: c953a747456cc6b6804feae3ffee3793662e8c50 SHA-256: 2a1f50beea619947979cd9aca86743a6ccfa5d2f70e0d66abf9619d211ce7e72
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=fender+gb+hot+rod+deluxe+112+enclosure In PDF document text
    • https://vakapivakanerij.weebly.com/uploads/1/3/4/4/134478061/pewosisomajig.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/2705551.pdfIn PDF document text
    • https://mozepuboxiwagu.weebly.com/uploads/1/3/6/0/136094106/divajepiluvi.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/2d6b3500-9966-490d-b175-62999e6ecde6/graphing_absolute_value_functions_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/62487973473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23224f75-b9f3-4317-b387-c6ebd3991066/tupabunuzotuxadixuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/kepukiranale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33954aab-4ae1-4fa6-9982-9a38e089c7b4/is_3950x_worth_it_over_3900x.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/galway_girl_ed_sheeran_piano_sheet_music.pdfIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_0bfd39e82cf449c2942d1ef5a01eb8ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b559dfd-a514-4f65-b34c-542b2a62a843/80556934699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9fac7c-c2fd-4233-a59a-866ece9631fd/3540256328.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/vodijar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be7e957-2b7b-473b-b953-5f4a69c427ae/how_to_do_wire_transfer_suntrust.pdfIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_a806511a717b48beae7596d4ccab9969.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b87a2b-bfec-4450-95b7-ee5f3f06e9b2/zikoragitegomexuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437e9647-c10e-4fb8-a09b-3fc11779a83c/volabobutuduwirivojeda.pdfIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_86e8a45444ef456faf51cf6f5b2da27d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d463b9-0b2f-42ba-ba6a-d099e18c0b40/cfa_level_1_exam_rate.pdfIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_e0046f5f53ef4647be88edc29dd072b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3ed8677-c44d-4fdf-a7ec-7ac7877cf5dc/vovogobapifo.pdfIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_937ee987814148b8bb2bc1d6536342ad.pdf?index=trueIn 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_off0000d5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BB 5336 bytes
SHA-256: ec697b0cf280f9666e486ab96a7dad0ef8485af5b02d7f6d385a4798705122b2
font_01_sfnt_off0000e7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E9 10272 bytes
SHA-256: abe8e5f99db717d707940b9f97ce395ea1abd8334f43414c444194d173986a6a