Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b95f2a102261389…

MALICIOUS

PDF

78.2 KB Created: 2021-03-05 03:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b532e4d747e59718d51b0a5c958450f0 SHA-1: c6892b3645a83fec9b31b5e4dabd95130e293fe1 SHA-256: 8b95f2a1022613893ed2b397959d07bf8e50ce1e3fa00e19546c3ea0a1232547
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to exploit users by presenting a lure and encouraging clicks to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/strik?utm_term=monster+vault+safe+review PDF link annotation
    • http://semengergel.ru/ledesi3t0q3.pdfIn PDF document text
    • http://streichpack.online/appreciative_advisingm4h54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469640/normal_5ff76452ea1b1.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/34910877386tfs52.pdfIn PDF document text
    • http://poroda.site/vitopekojipefeliwanili2ox0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392872/normal_6022dad7c03d8.pdfIn PDF document text
    • http://keepxufi.space/282709717163hc4x.pdfIn PDF document text
    • http://uscarinsurance.info/dowivafezatajojegul2hna.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/9f66f6b2c7ca.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/60573973550m0bbm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_601879597dd46.pdfIn PDF document text
    • http://arfesopt.com/the_hunger_games_mockingjay_part_1_full_movie_free_123moviess27qh.pdfIn PDF document text
    • http://rollernefrit.xyz/jelabifukipipumedofememwfbpf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_5fd26c9f84a89.pdfIn PDF document text
    • https://sojuvamufivuleb.weebly.com/uploads/1/3/0/8/130874470/8afb2e155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_603f974db3b77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_5f39ae237fea442ca31c65b416277b46.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_bde3df8a79a94dfab1beef2e2e15d190.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_8ba4160ba2874a1bb25d07016f3abc9c.pdf?index=trueIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_89dab30757664a538b93ee02d274af8c.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_e32cbf355dcb4dd5b8a30d53171caef6.pdf?index=trueIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_540cfe35f7624f0ea339645e49b78058.pdf?index=trueIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_72c3b593e30447018f03784082ee4ac1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF288 4916 bytes
SHA-256: 442b7d9026056cc3f374084a51831c0a47503140da3e139f72fbed8c34074d49
font_01_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 11200 bytes
SHA-256: c38e8fe60a95665e45f60a8d98efbbcae96ea47ae4fe591433a73650ced00ed1

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