Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ce4f3fc9fa53c0…

MALICIOUS

PDF

85.9 KB Created: 2020-12-19 12:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 889fd842187124584c3c9968f3761f47 SHA-1: 18549dd45bd44e323028bdac7f14e6780ea531d7 SHA-256: 55ce4f3fc9fa53c0a2b0d75dfe4fc17ba30a8e37f046914e7304cc4db89ba8f1
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URL `https://traffking.ru/123?utm_term=personal+history+statement+examples+graduate+school` is identified as a known malicious redirector. The document's structure and embedded links suggest an attempt to direct users to potentially harmful content, likely for 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/123?utm_term=personal+history+statement+examples+graduate+school In PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/susaragunod.pdfIn PDF document text
    • https://pudefita.weebly.com/uploads/1/3/4/4/134476078/soribilosefikom_voporem_muminabi_beroluj.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/8742883.pdfIn PDF document text
    • https://rajuvafawomok.weebly.com/uploads/1/3/4/4/134455823/1714657.pdfIn PDF document text
    • https://subarijarasojud.weebly.com/uploads/1/3/4/3/134332778/mamaxidosem.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/6a12abf5-5b46-4352-96e3-ba1b7d3878fe/cours_svt_seconde_adn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ec11e4-5c49-4d48-90d1-6ceb302e5dee/badorawamexajawebo.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/birthday_wishes_for_brother_video.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/livitokuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d527538-0792-4340-adfc-ad6fe849dd92/hum_sath_sath_hai_full_movie_free_download_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3399c855-f338-404d-a5e6-fc0a5021a77d/daisy_fuentes_hot.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/59378931730.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/a_level_topical_past_papers_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/xekavimu.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/angular_5_file_from_api.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_off000111ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BA 5660 bytes
SHA-256: 7e932d88b61921e943e9ecf1ae87dee6f5cbdf4a95fe38ee15c2d92b11955317
font_01_sfnt_off000124e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E2 10900 bytes
SHA-256: daae7d05d4fdb95b9a20f2d66514713d06205ae42a8f2329fa6f0e57c9200416

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