Malicious PDF — malware analysis report

Static analysis result for SHA-256 4463cae5e3ec5fdf…

MALICIOUS

PDF

67.7 KB Created: 2020-11-19 20:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8e90f27d4ae4373e20078600e2a7ad70 SHA-1: 9e220435f963563eb78e2ee5432e3d4ca845a669 SHA-256: 4463cae5e3ec5fdfdd4ac1a315701f4d0ac388b78e96595e8ca36ac929d38a37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a large number of external links, characteristic of a PDF link farm. One of the primary external links points to a suspicious domain, suggesting a phishing or malicious content distribution attempt. The presence of numerous external links, including one to a potentially malicious domain, indicates an attempt to redirect users to harmful content.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/123?utm_term=mountain+meditation+script PDF link annotation
    • https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/mafabo-wijababesi-tugiwogi.pdfIn PDF document text
    • https://lugesivewamaxiz.weebly.com/uploads/1/3/4/5/134596289/majumaki-nisozajatofa-nufifod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404983/normal_5f9377f9d7797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407057/normal_5fadac47732b8.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/jazuravazaguz/lyman_shotshell_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/bollywood_movie_song_2019_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/estrenos_de_netflix_diciembre_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/84145285470.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/30397895180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22aa7369-3884-49d5-a715-a9a8af31f6aa/kijiruluso.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/64695603432.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/16897473550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09afd085-6feb-472f-b877-f65c2811ab48/pixujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd373a04-c008-4b60-9664-4bd5f1fbd2fd/49315853445.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/sample_exit_interview_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/77603097237.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_off0000ce0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0C 5192 bytes
SHA-256: 2b6e7bb52f1b9123b85754fa6c58449ef9756aa0049e1811c1b10709da97019e
font_01_sfnt_off0000dfa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA8 9908 bytes
SHA-256: e12e6d69b561382bceef63bcce29f2fbdc2c11d3be50f3cbd6ef9992d2b06720

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