Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c97d82719f9253…

MALICIOUS

PDF

80.7 KB Created: 2021-03-30 19:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9218c39d119c63b044fec0e0a40cb070 SHA-1: 24583f2274712adbfc03a0010b540c15a174864f SHA-256: 29c97d82719f92534182578033e02ceb37c10e915aa50bad701213fb5f1c6fdb
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent URL pointing to a suspicious domain, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious content.

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
  • 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://lozipotod.ru/award?keyword=cat+2020+paper+pdf+hitbullseye PDF link annotation
    • http://soxitezi.iblogger.org/54610821104.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/jariditovunuguvulige.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/2326364.pdfIn PDF document text
    • http://mewibapevuwado.22web.org/main_features_of_academic_writing.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://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_1d20987fe0d74ed2beceb2caeb124390.pdf?index=trueIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_7182b4b3ccde458aa7adec40791d110c.pdf?index=trueIn PDF document text
    • http://fiwarirekagugen.epizy.com/kuririjasuragijavavut.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/kijowovazoj.pdfIn PDF document text
    • https://f8bd9030-4518-40b4-9047-d478e6ffc17b.filesusr.com/ugd/608fe2_31c190d42ea042a8bd1b758f4045fa6c.pdf?index=trueIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_25149653c5054b5dabdd733151bc99c7.pdf?index=trueIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_f0ac245ccd7e4253916669e4fc5a6d71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mixanaz/99525102359.pdfIn PDF document text
    • http://dopovis.myartsonline.com/71336172988.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/edmodo_pc_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/bonnie_mckee_american_girl.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_1de2868b4daa4e09bd42fca153670ff3.pdf?index=trueIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_6515d2263c624fb4aac3389b38194394.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/european_leukemianet_guidelines_2017.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_off0000f0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FF 5332 bytes
SHA-256: 488c076243aeacc68121278bb95687fbe43c0b187a610dbdf6a43d3e404f9515
font_01_sfnt_off0001033a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033A 10744 bytes
SHA-256: 43ae6ffe8dfcefa19ddb682fe3a55b291f4d921b83fe1cf82dfd7e65b7bb35fc
font_02_sfnt_off000127c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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