Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71a314f6323ec8e…

MALICIOUS

PDF

77.8 KB Created: 2021-03-09 23:46:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b9ba8f7213738a40f9a713b4b74c5ff5 SHA-1: eb0497f57b107971194c28d5f7fb13a4cc381fd7 SHA-256: f71a314f6323ec8e396e472b51ef6663a0546f58b82d1b3bd84ea8ab9aa4dd4c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, likely leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/123?utm_term=formation+adulte+agent+immobilier+rennes PDF link annotation
    • http://jiviruke.iblogger.org/bafusatudedu.pdfIn PDF document text
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/612699.pdfIn PDF document text
    • https://fabuxitewuf.weebly.com/uploads/1/3/4/3/134349615/sagotegowufa.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/3443665b-7170-42fc-8c66-4d6d964ffe7a/fadudodutuxiwilitokedota.pdfIn PDF document text
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_228181eabe8244f29d15596ed5fa1791.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/46508598187.pdfIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_295c64429d2a4f74b79589613173dd60.pdf?index=trueIn PDF document text
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_084bc2c67b25401987c5b94f2801dcf8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/blank_wedding_invitation_cards_templates_free.pdfIn PDF document text
    • http://tovapas.epizy.com/72678422770.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_0f305683022243b98db9efce51113ab5.pdf?index=trueIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_95226dd485694b0c8ca751b42c785680.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc9feee-2804-44ee-8be6-6b41cb6be068/617405917.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/68271018121.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/datuxebaderixazaf.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_e2f9362d0f1b444cbac3a6d75c0ad67e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/autoconhecimento_psicologia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa24ea12-51f1-4995-be76-6f86964b05e9/metodologia_de_la_investigacion_unam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6759538-c856-4219-a5bc-9c63a3bdfa1e/totudinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d039c3eb-0377-4301-8d45-d4469e34cc6a/badekelogi.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_off0000e2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AE 5120 bytes
SHA-256: 4853410795a7b9ac6ad4ab97b6ccdbb4927222564b07003b09515791b7635e98
font_01_sfnt_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 11940 bytes
SHA-256: f5e92c76dff31faf597c4f481fcbba264df5fd291c742cf7383a35d94ade025e
font_02_sfnt_off000119ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CA 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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