Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d25f7adda11c9a7…

MALICIOUS

PDF

83.3 KB Created: 2021-03-15 05:35:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 00440a9554470ef2a54f1c32b09df683 SHA-1: c569d28bcec2adb0cf9bac9ade8e54891e98d237 SHA-256: 3d25f7adda11c9a7fb2e6aabe7c4430c697209fca6d78439e1f8baf23e0f1f69
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of 'utm_term' in one of the URLs indicates tracking, common in phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/123?utm_term=chaita+ki+chaitwal+mp4+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486033/normal_601a522097011.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/Tgihhia/supply_house_promo_code_2020.pdfIn PDF document text
    • https://lulezurikut.weebly.com/uploads/1/3/4/6/134667205/linonitopofeger.pdfIn PDF document text
    • https://tujakiko.weebly.com/uploads/1/3/0/8/130814553/zevadegenamezaz-lezadebuwevem-jukuwanotuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_5fe64a0530cb1.pdfIn PDF document text
    • http://beautysss.site/carry_on_bag_size_limit_emirates3kzlp.pdfIn PDF document text
    • http://obuv-kozha.ru/palofozelidalugetakaxysqeb.pdfIn PDF document text
    • https://cdn.sqhk.co/jilowepe/5JzzYgd/conjunction_test_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/dukapudubi/jg8if5Z/60100777262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478685/normal_5fd66163e2bd1.pdfIn PDF document text
    • http://consequences.space/libro_centrales_termicas_de_ciclo_combinadodnldz.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/2517255.pdfIn PDF document text
    • https://filudatobo.weebly.com/uploads/1/3/2/6/132681654/rogaguwusebe.pdfIn PDF document text
    • https://cdn.sqhk.co/pakelabete/ieRPcT0/the_witcher_3_white_wolf_hd_live_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_601806a5f3ffb.pdfIn PDF document text
    • http://twitter-center.com/29390153345swoeu.pdfIn PDF document text
    • https://tuvozejuwubox.weebly.com/uploads/1/3/4/3/134323710/9888261.pdfIn PDF document text
    • http://mexicotop3.xyz/248518819731mzd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_19a848b4fb454aa19579343855d9a9ac.pdf?index=trueIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_f8aedf3b70ac4f4aac89ab5ce90caa43.pdf?index=trueIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_946d3b831fc74a9d8fe3b1db9ec22942.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_d06a7bb9a0884ab19b707f404860e19d.pdf?index=trueIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_281fa7e5ff1e499fac681a8e549c756b.pdf?index=trueIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_99e899f0402c4ce78e81bb4e749c9701.pdf?index=trueIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_17dcd933e2db426581c9908a92f7151c.pdf?index=trueIn 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_off0000f125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF125 5248 bytes
SHA-256: 6bc29e234ec6cb51aa926ad3c1c7b64c69ac58661154a03c26a4ccca6a6a7ecf
font_01_sfnt_off000102f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 12292 bytes
SHA-256: 0a8b3fc7f8932a1fa0d42d1aa303e77f624475fd375524497c7ce01268595775
font_02_sfnt_off00012b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0A 5344 bytes
SHA-256: e82d5ba75d717a79955f2e448ac3601acdcbccc74e2293aedc8381dbcf04b085