Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b7ff8647ffe0ff…

MALICIOUS

PDF

71.1 KB Created: 2021-02-13 05:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8eb13517fa8a19f64bc7f6ed657df908 SHA-1: 266329036412c5acd372c89ff69d11fe5b539d24 SHA-256: 67b7ff8647ffe0ff5c4a19efbc2be0ac329b31655c00b2dc673ecd15532b22e1
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious infrastructure. The presence of embedded URLs and the nature of the links align with a phishing attack pattern.

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
  • 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 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://crophysi.ru/123?utm_term=pho+vietnam+menu+scarborough In PDF document text
    • http://4gusevshop.space/933295426jqddt.pdfIn PDF document text
    • http://prizinsta.info/9062810395wwyqe.pdfIn PDF document text
    • http://topfrag.rip/38455762260iwcnn.pdfIn PDF document text
    • http://vash-fasad.live/76726580408osw1v.pdfIn PDF document text
    • http://tiktoktop.design/aamc_mcat_practice_test_predictability4sq5p.pdfIn PDF document text
    • http://zoo-taxi.site/45532535871s3qyb.pdfIn PDF document text
    • http://fastcreditcheck.info/59279593818unz2v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fec695fa9dea.pdfIn PDF document text
    • http://jofefipibabalul.22web.org/ambiguous_loss_book.pdfIn PDF document text
    • http://trelon.fun/jifexiwumu1apo.pdfIn PDF document text
    • http://ses-paypal.com/awk_command_in_linux_with_examplesbumkn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379987/normal_5ff58c4f00c86.pdfIn PDF document text
    • http://megikinazemurel.22web.org/excel_proforma_invoice_template.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/1158340.pdfIn PDF document text
    • http://sobakin.space/startup_fitness_company_los_angelesev2sf.pdfIn PDF document text
    • http://getveran.site/bapowavevituzc364.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/waturasiredo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lazasubesuwup.epizy.com/88725859147.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_off0000ce5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5A 2968 bytes
SHA-256: afcae459a23cd8fad60e71fa482ed795063b178ca7a96d5a337757ed3e51a98b
font_01_sfnt_off0000d900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD900 5380 bytes
SHA-256: 7df4e927c66e65583ff8fb7bbd87091e814f2c8f344f9894b13041be3ea6eb03
font_02_sfnt_off0000eb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB29 10312 bytes
SHA-256: 3ce47e740823b0c43dba707160abc7061002dc741b1f563587547727d12f5453

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