Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e291444c19dc26…

MALICIOUS

PDF

76.2 KB Created: 2021-04-19 04:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7a0be6ad4cf44ec5aa0c4a08bece26d SHA-1: e3399824ed43b6f7e687b907138db623ce302f1c SHA-256: 08e291444c19dc2682ffad39ef87d2820713314a2430f56322c7b9d607ae1621
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with the primary suspicious URL being resalured.ru. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to create a link farm for SEO manipulation or to host malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. Although no scripts were explicitly extracted, the nature of the PDF and the embedded links strongly suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=the+christmas+carol+characters
    • http://lomigakorak.getenjoyment.net/pete_the_cat_thanksgiving_book_read_aloud.pdf
    • https://jotutavujisab.weebly.com/uploads/1/3/1/1/131164129/mogonopojilu.pdf
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/tipofoluwavevatogo.pdf
    • https://static.s123-cdn-static.com/uploads/4483336/normal_5fdd772976ede.pdf
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/xiterabufupo.pdf
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/pulezerum-zoxogadunapa.pdf
    • http://pagavopalubutu.scienceontheweb.net/8911164726.pdf
    • https://jumaxejew.weebly.com/uploads/1/3/1/6/131606465/1197210.pdf
    • https://cdn-cms.f-static.net/uploads/4465543/normal_60403e5c72a7c.pdf
    • http://narovomesizi.medianewsonline.com/microsoft_certified_azure_security_engineer_associate.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_9e2930306eb74f559ccb45bb21f36e12.pdf?index=true
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_6a8d807f232d4b998a104e124536162e.pdf?index=true
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_b3d5be2ec0e6429795bdd0f0a72274b3.pdf?index=true
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_f281a96f77314c0cae1e8cc9cb30cdc3.pdf?index=true
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_3cc72ba1b6714e3fae420c35a5073c3a.pdf?index=true
    • https://d80f29e5-b60c-4034-b355-14c03cb49cca.filesusr.com/ugd/ff44ec_559db524033f496590a367569a11b27c.pdf?index=true
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_f2fc5c05207c4e6d8d649a6dcd694534.pdf?index=true
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_6182d93e5f0e4ccc9999c3d49a9f720b.pdf?index=true
    • https://86a6be6f-1c3f-48a2-98e5-8a654ddc1212.filesusr.com/ugd/027f51_2d9fef53846a426d8d8877d58c303eb9.pdf?index=true
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_05a91dce952d4a449e114743deea7282.pdf?index=true
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_470713046090491e879a198c1494df08.pdf?index=true
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0f.bin
3005f59754b02a629f678bcbab2208aeff08d285a4f270e121b78517c8b4d22a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 4988 bytes
font_01_sfnt_off0000fed0.bin
6ad32bad70dbd859b867c20b1223a904eeb23d476893639ebf07e0c4ea0e87a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED0 10356 bytes

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