Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29b947186adc71d…

MALICIOUS

PDF

87.9 KB Created: 2021-04-25 13:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d48b2926b492bc40dfc7225e6f8484b3 SHA-1: 12aee417ab7e1bcd7736107fe72c1d4c8834a6f5 SHA-256: e29b947186adc71d85bdb0931d30e911ef24923fe1ecacd314af8d972371e035
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The embedded URLs suggest a tactic to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=the+monkeys+band+who+is+still+alive PDF link annotation
    • https://cdn.sqhk.co/xakalodesi/O4wigkM/chaita_video_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/wewesodabutu/emibchj/59753387807.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/elAhdJ8/rock_vs_guitar_legends_2017_hd_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/1He6ygY/kojivadusuvav.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/cVDnQih/20747913762.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://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_c54b8deeb4094f2e9fee6c4125ba098d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dee4e38-f75d-4e99-bbc1-40a23d42ea8c/wopoxen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94bccd0d-aef1-4876-b50d-a50a7e447de3/dupibasotinobivige.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/35133877538.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/manualidades_con_material_reciclado_faciles.pdfIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_7c176196e6084317bff41469d5718efe.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_5b224cdc63354082af10a49c32476746.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dae441e-e9cb-4275-ba7e-612e3974405f/pipanafakepudexazigi.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/calendario_biodinamico_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/fovabefej.pdfIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_144a78a1040f49feb04d8b3ce1b0c112.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7791e28-b4f6-4e2b-88a3-a6fea0831be0/saterad.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_30be50e8008e46f59f496e8bc3604bd6.pdf?index=trueIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_02d8b1451f24490d83cc7df70067bc28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/physics_wave_equation_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/sam_harris_lying_podcast.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/76040550882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddd1785-c5fe-4c20-9939-4377edd46331/8594007035.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_off000106d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D7 5164 bytes
SHA-256: 26684c644c7774878e0923499ee80abd84c4a4997b28b9591da4a3b674b88a79
font_01_sfnt_off00011857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11857 12784 bytes
SHA-256: 0092bd76f6c006a0ee227b3f70805d4986d713ce1bc1af45a8682b702e3910d4
font_02_sfnt_off00014224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14224 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e