Malicious PDF — malware analysis report

Static analysis result for SHA-256 7daea59d2b95dafb…

MALICIOUS

PDF

68.6 KB Created: 2020-11-18 02:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5b7a86004f06878638f90544e9512b99 SHA-1: 089f5621af7afc24a69bc10a5488d9366c1c2349 SHA-256: 7daea59d2b95dafb575c9f49f7b562341b1b49df39ad745aacde5297ec011035
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'traffine.ru'. The file is also flagged by a machine learning model and ClamAV as malicious, specifically as 'Pdf.Phishing.Trojan'. The presence of a link farm suggests an attempt to distribute malicious content or phish users by disguising the true intent behind seemingly legitimate 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://traffine.ru/strik?utm_term=laboratorios+en+aguascalientes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f9e92e00b72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f9c84d5a574f.pdfIn PDF document text
    • https://peketavapi.weebly.com/uploads/1/3/4/3/134331612/guluniretebilis-vadopor-wibafarile.pdfIn PDF document text
    • https://tivaxuxilo.weebly.com/uploads/1/3/4/1/134131375/xawojezomasek.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/henghuili-files/hematopoiesis_review.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/technology_is_just_a_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/robirofanedatagejokanoref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377a33c4-2c23-4815-a7a2-780207f77663/59050764401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb3ecd2-c6e8-443f-b860-d997da3d5de4/68896351410.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/desktop_icons_disappeared_on_imac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a91775-7f75-4848-93c1-938cbb3697d6/manumavadazevotedobiwet.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/chrome_flags_android_address_bar.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_off0000ce44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE44 5048 bytes
SHA-256: f7d74b0fddf1449fc62040cbaf7981a5aa043c78943ec843a4b869f39f6e9af0
font_01_sfnt_off0000df83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 11196 bytes
SHA-256: cba5a8eb22ca07a54991ca35c6d97fcad92b70e45102c2df8b19000b85105850

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