Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a155459dac76464…

MALICIOUS

PDF

74.1 KB Created: 2021-04-02 15:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bf45bb230bb27e32c5df280f25eb9683 SHA-1: 6b127f3a4d30ff337aac7feaf50dd37aa5e48199 SHA-256: 6a155459dac764640a2cf74d5d1c50afaf23a93501ec34880b413ce44f6cda5b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of many external links points to an attack pattern focused on redirecting users to potentially harmful sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/wix?keyword=glowstone+dust+minecraft+xbox+360 PDF link annotation
    • http://nomevufaneboja.mypressonline.com/mopabu.pdfIn PDF document text
    • http://wetiludivarag.scienceontheweb.net/winchester_model_12_shotgun_owners_manual.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/how_to_sketch_a_graph_of_a_function.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikamid.epizy.com/definition_of_argumentative_text.pdfIn PDF document text
    • http://xigamika.rf.gd/en_el_tiempo_de_las_mariposas_pelcula_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/treating_metabolic_acidosis_in_cats.pdfIn PDF document text
    • http://mifofoxidil.onlinewebshop.net/rhinestone_cowboy_piano_sheet_music.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_04acf10d8b8c4f80aea6530366bb019f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/36768564112.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_55386666c9de41569118160eb3d17d7b.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_0a4dc800f4084abea45ce023f83efb71.pdf?index=trueIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_d0df840573c042d7acea3d47c601dab4.pdf?index=trueIn PDF document text
    • http://kobomuxowujuvap.epizy.com/zukopawunaro.pdfIn PDF document text
    • http://mikijanux.atwebpages.com/modern_age_of_english_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653b6a51-ed12-4c4e-b1f3-89819618524a/nofavedapuvid.pdfIn PDF document text
    • http://janalusexisowa.epizy.com/vagowipilifogomufopup.pdfIn PDF document text
    • http://lafebevu.rf.gd/pavejaganonotoxuragujin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7e5df48-3584-45f1-a870-d2ffa29e1eb0/digital_logic_design_software_free_download.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_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 5960 bytes
SHA-256: e3ca23da6f382300d6fdeb8111fd4c8e3e4cd0ee3df60248c93dc2b9a51be322
font_01_sfnt_off0000f687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF687 10652 bytes
SHA-256: 06933e955a74ac34eaf3aa4976d4752c9b82de6a26f828b36d4cf787a7a9c3ac

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