Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b38b73457982da…

MALICIOUS

PDF

71.2 KB Created: 2020-11-30 12:38:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b0ede8379d4f9c2bbf1b8eb41bff1cff SHA-1: 7dccf791f3db4a9bed8d67ac5f750e69b3292b7a SHA-256: 00b38b73457982dacfbc3e6a53f28d89488558b2c5cad8005a37ad3bdcf88252
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a redirector to known malicious infrastructure. Another heuristic indicates a link farm, suggesting an attempt to manipulate search engine results or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 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.
  • 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://traffking.ru/aws?utm_term=business+action+plan+template+free In PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/zamawekesibajof.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/saxivebelo_tolazimit_zedexatelodo.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/fb2cf871-eb0c-459d-b35c-63783e2404f6/vesivorizo.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/surimujoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb54778-f1bb-4b77-b1cc-e3a723649a5d/43604372450.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/21334666066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/651a7b90-b675-4e6c-a29c-63cfe7c5de10/honda_xr_125_l_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/faxuxilexupifipotuneduzuv.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/jane_smisor_bastien.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/dog_from_the_nightmare_before_christmas_name.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/godrej_properties_limited_annual_report_2016-_17.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/spongebob_vacuum_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/559b852c-dd9e-4427-b7a1-7a1a46499852/51314720548.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/bhojraj_dwivedi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b5bec30a162e0c519083/t/5fc29dda18e72e5fdb2d3184/1606589917763/sun_8th_house_cancer.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/brucella_bacteria.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_off0000db59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB59 5212 bytes
SHA-256: 8df81eb1a8f50bda2802d79e890bdbd9aee717b40ac5efa6cc07f7d206baf047
font_01_sfnt_off0000ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 10304 bytes
SHA-256: a8124c76a2c54221c8c619155126659e991d9d51b1264c27c1cb25135a3b1e5f

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