Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82d752be788d059…

MALICIOUS

PDF

65.3 KB Created: 2020-11-25 11:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: caeedf24062b507ebc8a27f4abae6d35 SHA-1: 11f8ea79cbe648263df145001cc3b3e608d8fa99 SHA-256: b82d752be788d059645945d02d050c17900d916fb90728432d1c2391998192cc
214 Risk Score

Malware Insights

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

The PDF contains embedded links and is flagged as a malicious redirector, indicating an attempt to lead users to harmful websites. The document body, though heavily obfuscated, contains text related to 'La crosse technology atomic time clock instructions', likely a lure. The presence of multiple PDF links and a high ML classifier score further support its malicious nature.

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://gettraff.ru/strik?utm_term=la+crosse+technology+atomic+time+clock+instructions In PDF document text
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/9043381.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3808383.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/sabaro.pdfIn PDF document text
    • https://vitumiwoz.weebly.com/uploads/1/3/4/6/134697216/8150960.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wavunot/keradefogebipapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf1df05e-88a7-4fb3-9012-f8ed083e96cf/cut_and_paste_cvc_words_for_kindergarten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ea7703-c125-4a09-9010-8177da4cb607/kiwamowap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10667c83-87a3-445d-96e9-4d37479c5287/where_im_calling_from.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d286de8d-84c2-4379-8883-36175edbabca/wipewoxipopomisukopuxan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd4d441-8a41-4b8e-a4ff-b1a071c1b406/kewurobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be82aaf-9434-4b66-85cd-ab4a39157aa5/pokemon_omega_ruby_legendary_exclusives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9fb273-4e7a-45d1-858c-4f16b82579bc/74855241169.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_off0000c324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC324 5320 bytes
SHA-256: 6bc9768312154ac075f672d7bd0a86daf1e7e5b9223a284961c309d216cc576f
font_01_sfnt_off0000d51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51F 10300 bytes
SHA-256: 8ad719d85461bb82c836f4214ebcdedf00019242093991ebc4ff99d926d056cc

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