Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d5be9d865c8c3f…

MALICIOUS

PDF

69.1 KB Created: 2021-03-05 22:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 49fbf9e12e1ae7a59a610e5c7b1606c5 SHA-1: e2b2a44303d5f159f02e436bd605ea0641d3c46e SHA-256: a6d5be9d865c8c3f6aca309347427521f131ec83bd075050efe133ba86dbb0a4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO manipulation or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the presence of embedded URLs suggests an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wb?keyword=after%20we%20collided%20release%20date%20australia%20hoyts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385217/normal_5ffca2c0d07ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502906/normal_6030dd9b8d715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5fe84726adef5.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuzorumuji/jeHziby/voltage_drop_calculator_dc_resistor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370767/normal_5fdae83a4e716.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/D2hhhjq/91569768020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_98e4e260cd2a4624befe116ca7bea454.pdf?index=trueIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_4662a76531b64599b6784fac31259010.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jawusawar/51650286776.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/analog_lab_lite_error.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_b67eefab26d24aae8118b9fe0bbde509.pdf?index=trueIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_f959c24b891a49448b9cbc9335a0bc22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukusa/how_to_use_mendeley_in_word_mac.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_dbb5d1fb3f154310803811f5152001a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/66196824568.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/codecademy_c.pdfIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_ba712b6eacd04a2094f16d1a6ce108c7.pdf?index=trueIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_90a6c54415314eb380f46d2c4c1423c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/fepano.pdfIn PDF document text
    • https://e9155d39-0f7d-4366-9ee8-34e17fe3d773.filesusr.com/ugd/9e05b8_8eb46189e97a46f2af4bc111cbe826ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/91359767916.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_off0000d26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26B 5292 bytes
SHA-256: 3870a4d4b599c246081d30860dc368cc12933c612e3a6db6cea146faa4867b3b
font_01_sfnt_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 10352 bytes
SHA-256: cce19000ef4770ba491b2be183890283d6587d39eaa7da4110c046da6124436f

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