Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70cbd1bcb3ee87f…

MALICIOUS

PDF

78.0 KB Created: 2021-04-03 22:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bce9e9de0b072372a6355f1a2e3426b0 SHA-1: da77564857a81555b31b28ddebb40ddacba5fc61 SHA-256: e70cbd1bcb3ee87f5dad03501cf18eb9b5455a1219402032d091bec0e691d228
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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 http://dawezedelofeda.scienceontheweb.net/josobezupipufib.pdf In PDF document text
    • http://begdas.fun/xibupusowexepamcoxl2.pdfIn PDF document text
    • http://lbaranaydin.com/soxagiremuretavexabexy6r4t.pdfIn PDF document text
    • http://norasuzajo.mywebcommunity.org/gawati.pdfIn PDF document text
    • http://tumbaa.space/kaniwupawilefozuputonk61us.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500430/normal_5ffd722965f66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418584/normal_5ffacf5cc5dd0.pdfIn PDF document text
    • http://jerugujekema.getenjoyment.net/ahmet_cevdet_paa_kitaplar.pdfIn PDF document text
    • http://jerugujekema.getenjoyment.net/vafazuwojidugonazulu.pdfIn PDF document text
    • http://grigolia-studio.ru/3091099698600ys0.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/ichdugd/rarobowuxerudegixadafuz.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/agia0Rf/used_large_fish_tanks_for_sale_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fccb196b0c3e.pdfIn PDF document text
    • http://cheapkeys.site/88346139439ivasl.pdfIn PDF document text
    • http://lugirepapirizo.scienceontheweb.net/8th_grade_pre_algebra_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/mO-5lVq97NI/wb?keyword=when%20breath%20becomes%20air%20%E2%80%93%20paul%20kalanithiPDF link annotation
    • http://pikubub.onlinewebshop.net/zojubimapeduvexobajem.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_62e926fb21e84a10b96ddb2062a89dcb.pdf?index=trueIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_42d3629bd6144a4bafd7e9f4d8f2f45b.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_40292ad1727947e391c66cac259ea3c1.pdf?index=trueIn PDF document text
    • http://jupegojut.atwebpages.com/banten_adalah.pdfIn PDF document text
    • http://segimoto.myartsonline.com/xakejadugele.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/61859218700.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_e5333515995d47b2862a3acbe88c25e3.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_befc5d4562ad411b83fa85bea7346214.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_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 5420 bytes
SHA-256: b35f621826ed7f6a3c0851b3d2b543f573703a2298419dfa3637cb8262f5ac80
font_01_sfnt_off000102c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C2 10900 bytes
SHA-256: a0ae231c745f42990392ba06cd7690b9feac5635baf68f6f508dc98dde18278e

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