Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4d42afa35d6532…

MALICIOUS

PDF

72.8 KB Created: 2021-01-13 10:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fdf6d11515ae10d673fc8d010fba11ec SHA-1: 7139b00c75440330a6b44d948da32e55b1bdaa65 SHA-256: af4d42afa35d65325336543f4759371c98113816c0350061541971cdfcd83188
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one heuristic specifically identifying a link to known malicious redirector infrastructure. Another heuristic indicates a large number of PDF links, suggesting a link farm for SEO manipulation or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

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://cctraff.ru/123?utm_term=ati+teas+secrets+study+guide+teas+6+complete+study+manual In PDF document text
    • https://cdn.sqhk.co/zefipuvuwifi/TgfQhaR/2048x1152_images_for_youtube_download.pdfIn PDF document text
    • https://jiketajaw.weebly.com/uploads/1/3/4/4/134464131/9515015.pdfIn PDF document text
    • https://site-1168272.mozfiles.com/files/1168272/36842721078.pdfIn PDF document text
    • https://kukotefuses.weebly.com/uploads/1/3/1/6/131637352/a71bc7d8a.pdfIn PDF document text
    • https://letalisukom.weebly.com/uploads/1/3/4/3/134316231/lelorafufuz.pdfIn PDF document text
    • https://site-1168007.mozfiles.com/files/1168007/crazy_cooking_star_chef_coupon_code.pdfIn PDF document text
    • https://cdn.sqhk.co/ligazupevu/fgehdps/76561805893.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/malebawujomu.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://s3.amazonaws.com/zewimu/punch_hero_hack_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/lake_ontario_fishing_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/logarithmic_mean_area.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/tableau_to_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/71276981947.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/maths_worksheets_year_4.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_off0000d0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CD 5520 bytes
SHA-256: d6edddd270d251ab31e925e465bc03c398ffa04903a1ece95010a3abbff3c0a9
font_01_sfnt_off0000e376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 10784 bytes
SHA-256: a375ab689b1784d400a5a22842c83ae9fb86cef4cc7eb4523a0a476ef583ad8f
font_02_sfnt_off000107ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.