Malicious PDF — malware analysis report

Static analysis result for SHA-256 6073700c232abb12…

MALICIOUS

PDF

75.7 KB Created: 2021-02-21 11:33:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3dec29b8961654c95171ef7bb872d6e9 SHA-1: b4d9ebe1e0f0e5190bc1272f5e4bd6389af72339 SHA-256: 6073700c232abb122123a67b7a1c7c9190106909e182e6e6414a7b879c34728b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO spam campaign.

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://bologen.ru/strik?utm_term=can+human+live+longer PDF link annotation
    • https://joworuzofoluj.weebly.com/uploads/1/3/2/6/132683209/lilipikavumedexepara.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/lulikifafamozadet.pdfIn PDF document text
    • https://dinowupeguf.weebly.com/uploads/1/3/1/3/131379410/9f444972958.pdfIn PDF document text
    • https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/ginowosemutu_xitamokiwisuzew_masedufimalagig_dezamuteziv.pdfIn PDF document text
    • http://basiditdcf.space/545709955830xrsv.pdfIn PDF document text
    • https://vebexedupatad.weebly.com/uploads/1/3/2/7/132740253/b7a6f.pdfIn PDF document text
    • http://ropikapusofune.iblogger.org/82599365135.pdfIn PDF document text
    • https://mogefitinovodug.weebly.com/uploads/1/3/0/9/130969954/futowux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lodusebivepakef.epizy.com/uk_fast_food_industry_report.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/siemens_automatic_transfer_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/bibaho_obhijaan_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/wewuge.pdfIn PDF document text
    • http://fudixuxutinizow.rf.gd/tolujisopumajix.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/printable_yoga_cards_free.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/asignaturas_ingenieria_informatica_uoc.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/63814187325.pdfIn PDF document text
    • http://madulok.epizy.com/usfda_guidelines_for_process_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/create_word_template_sharepoint.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_off0000edd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD6 4888 bytes
SHA-256: 1e3933a194c862c6bcdfcf5bb54588d5eaea148bec19f355b47250554a8bd2ea
font_01_sfnt_off0000fe4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4E 10304 bytes
SHA-256: d59906c7c632ca45490257015393f3be909f20ca2da45ec0b95b16d2ee525db2

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