Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eaa2fd6185c26a0…

MALICIOUS

PDF

65.5 KB Created: 2020-11-17 11:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6d707fd015a99c6102678f47a120615c SHA-1: c8067abbf63eb8263bc1a7e6cf8f73c661d5ae1c SHA-256: 3eaa2fd6185c26a045e8b7834e86204d885154d71024096a43e85089e95e74db
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be part of a lure, likely related to a 'catch rate calculator' or similar topic, designed to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=catch+rate+calculator+sword+shield In PDF document text
    • https://lupakekurusope.weebly.com/uploads/1/3/4/6/134652685/vilaxobebeb-jefekokil-pigotupezaxuti-xaromafi.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/zamozojofijife.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/wofiluxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5f89c3ea88462.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/kodowanebaderareg.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/218231ca-04bf-4696-ac1d-ce560d913499/7232125733.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/cheap_thrills_dance_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/27488795672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb72459-cdcd-4cf9-b4ee-f8615d815d9b/66905630944.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/anderson_county_jail_inmate_tn.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/spanish_irregular_preterite_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/blackwell_companion_to_hermeneutics.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/23780873252.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/72201756319.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_off0000c350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC350 5024 bytes
SHA-256: b160f699ed41c49746cb3c48b1deee85032f713ff27d5127540f8dd32319e8ed
font_01_sfnt_off0000d467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 10884 bytes
SHA-256: 05b5093f9bda6c11045423aed45ffa669cbe4d9206d3e592483ec9b1ac626ff5

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