Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2daed200ec2d7c…

MALICIOUS

PDF

76.2 KB Created: 2021-03-16 15:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7913e07d09bf12032c17a38cbe03c39 SHA-1: 3aa47b5ffdcfa17dd017a4c864ad3df722bb9e5c SHA-256: ed2daed200ec2d7c85d816b0748bee31e5f254c5821d9c81131f0687ddf43531
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other free hosting services, indicative of a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=simms+guide+jacket+-+women%2527s
    • https://dumaxenuwumav.weebly.com/uploads/1/3/3/9/133997891/vorexukomibir_povifujazep.pdf
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5feb689975bae.pdf
    • https://cdn-cms.f-static.net/uploads/4382004/normal_6033cb7155c1f.pdf
    • https://cdn-cms.f-static.net/uploads/4492272/normal_6039cfd1daef5.pdf
    • https://static.s123-cdn-static.com/uploads/4451565/normal_5fe2e1737c25d.pdf
    • https://static.s123-cdn-static.com/uploads/4459776/normal_5ff490c73d056.pdf
    • https://cdn-cms.f-static.net/uploads/4476270/normal_604d3cc3275e7.pdf
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fcacb0454e9e.pdf
    • https://static.s123-cdn-static.com/uploads/4408601/normal_5fd0396f5d74e.pdf
    • https://vesizolakaz.weebly.com/uploads/1/3/4/3/134333528/5f121975f8.pdf
    • https://cdn-cms.f-static.net/uploads/4464053/normal_601b7fa85f6aa.pdf
    • https://dosodufixelo.weebly.com/uploads/1/3/2/6/132682620/lunizo.pdf
    • http://zavarivaemvmeste.ru/who_dies_at_the_end_of_godfather_19z6hi.pdf
    • https://static.s123-cdn-static.com/uploads/4480170/normal_5fca2225b6871.pdf
    • http://levantegroup.net/avg_internet_security_2019_setupmf9gv.pdf
    • https://static.s123-cdn-static.com/uploads/4496216/normal_5fcc90ab0235c.pdf
    • https://cdn-cms.f-static.net/uploads/4476146/normal_6038ed7a33a6b.pdf
    • https://cdn-cms.f-static.net/uploads/4492253/normal_5fdbe37d0c672.pdf
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/7366073.pdf
    • http://cardioactiveufficiale.site/how_to_enable_dos_command_in_windows_7r9cmx.pdf
    • http://blockingscenery.com/what_does_hulu_have_that_netflix_doesnti2ufe.pdf
    • https://cdn-cms.f-static.net/uploads/4481280/normal_60119d5f0c873.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b7.bin
27b46d1910b4aa55526eed0403461c5a4df620fe9a127a981d4b1d5b95fb0d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B7 5532 bytes
font_01_sfnt_off0000e59f.bin
786def052226fafcba23e2d07adaaf300350752c02e9b24ff2ad46fbd5ef96ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE59F 11508 bytes
font_02_sfnt_off00010cff.bin
4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFF 16060 bytes

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