Malicious PDF — malware analysis report

Static analysis result for SHA-256 5400215f11eb47f5…

MALICIOUS

PDF

74.8 KB Created: 2020-11-11 01:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d8eba10214d192f24c930beaa5ade70f SHA-1: 0eb5da835a1140c5f2b4a1d15fb32c7379e9160b SHA-256: 5400215f11eb47f5c318c01f5278ffaf5187da3a22b6b05964048b886eb19d16
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious or SEO-spam content, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary malicious URL identified is trafffe.ru, which is likely used for phishing or to serve further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffe.ru/123?keyword=zillow+manchester+by+the+sea+ma PDF link annotation
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/pabada.pdfIn PDF document text
    • https://kiteginizi.weebly.com/uploads/1/3/1/8/131871518/fizuwanipapuzita.pdfIn PDF document text
    • https://gikigafe.weebly.com/uploads/1/3/4/4/134440869/2b521e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c31a3ef6-e3fb-4a70-9ee9-7956192ed810/blue_october_18th_floor_balcony_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e1af48-b8a6-401f-bff4-8bfc75317bb1/php_notice_array_to_string_conversion_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0bb2bf-11c4-49a7-a33e-789da64e2a58/casio_wave_ceptor_illuminator_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/63802156930.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/wivuguvukadusiwigaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8e137b-7860-4f06-8d40-510573e38ed0/chris_beazley_beaverdam_Virginia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d84523-d906-4a9b-a906-b185a7bd5fb0/alice_no_pais_do_quantum_ler_livro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35fc1f9-06ee-4792-879a-017ca3b9f345/85267274227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6cd0c5-1c1d-4a2b-88f6-3d5e7f97c7c8/financial_modeling_using_excel_and_vba.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/vital_medical_care_pllc.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/software_engineering_vs_computer_science.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/24540306841.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD564 5120 bytes
SHA-256: 1059e1b109354de1d3e47658b5047d28423943b6a0fe6d4d46664b05df18bc5e
font_01_sfnt_off0000e69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69E 12432 bytes
SHA-256: 870a21ec4817937f61c8b72c15d2b5e833c2791454c9c7efe5464ffec1ef879f
font_02_sfnt_off0001103f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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