Malicious PDF — malware analysis report

Static analysis result for SHA-256 563ee7911023704c…

MALICIOUS

PDF

89.4 KB Created: 2021-03-15 12:15:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9559d2c3f56045fbf4e72fdab742943c SHA-1: 7f5bec0697022b368589a67d915409c83e5a5fa5 SHA-256: 563ee7911023704cd823a238170651b5e1e2cab00b77a879a48b13ceb58634bc
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded URLs and the document's structure point towards an attempt to disguise malicious content as legitimate search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://seumenha.ru/strik?utm_term=what+phones+are+compatible+with+tracfone PDF link annotation
    • http://wutanitof.22web.org/bd_passport_renew_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477626/normal_5fcce3359ffbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416802/normal_60393bbe43ac4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450512/normal_5ff2540913aa2.pdfIn PDF document text
    • http://selizixid.iblogger.org/tidig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376629/normal_5fca86d148d32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_602b058e12074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_602a431533e4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_60164369834d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426418/normal_600b9e9625dfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382186/normal_5fefc8d98363a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_685ac247aa09401c942de73b1fd9c0cb.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_520a0ca9d5974f05a8ef4f3e21fbda9a.pdf?index=trueIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_2eb39b082284488cbd9298de87c16a00.pdf?index=trueIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_264dfc379c734298af19c22e121693bc.pdf?index=trueIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_e576eaa64952476d9161298846f09f31.pdf?index=trueIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_32c431b5c72b46e58b2908c94faed178.pdf?index=trueIn PDF document text
    • http://kuzebelinebofe.epizy.com/articles_of_association_template_uk_free.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_0287e8c914bb4ed7a03993edc4aca3a9.pdf?index=trueIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_86daccf0fbc9463d97395a16887f5377.pdf?index=trueIn PDF document text
    • http://mijumepalus.rf.gd/sivirodaziwirov.pdfIn PDF document text
    • http://molaken.rf.gd/2015_chrysler_200_limited_user_manual.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_8286d6f1c880473c96ae012fd11cf66e.pdf?index=trueIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_aff14e619b0843f8b8e82a358d945833.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10605 5500 bytes
SHA-256: 0f837c06775d97f818c1c7acc7ec1bee44feb400f671b0c0a6057116e536544a
font_01_sfnt_off000118a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A5 11732 bytes
SHA-256: 343a8b1c852416c4c49c7b2db7d42ca4054979f74531dd0f55bb025cb67cffb1
font_02_sfnt_off000140c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C7 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61