Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e66102d40a6465…

MALICIOUS

PDF

76.9 KB Created: 2021-05-24 23:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 540c301b845a94a6c9fd258c7ca5ab6d SHA-1: 6aaec4bd53cad1d8e3689885ea1b5ad3f136bc9b SHA-256: 02e66102d40a64653fd3e14b733eb8617709261c8a9968c97bc290b20fdcb17c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism. The primary external URL, https://xajibur.ru/strik?utm_term=how+to+come+up+with+a+greek+god+name, is likely part of a phishing or scam campaign.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=how+to+come+up+with+a+greek+god+name
    • https://cdn-cms.f-static.net/uploads/4452376/normal_6022bda53c628.pdf
    • https://refiraledekire.weebly.com/uploads/1/3/4/7/134715744/00af0b3.pdf
    • https://memapuzubabevu.weebly.com/uploads/1/3/0/8/130813849/015a6bd18be.pdf
    • https://cdn-cms.f-static.net/uploads/4411691/normal_600fc888a3243.pdf
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5fe60f832762e.pdf
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/kuniwozusog_tavujezuki.pdf
    • https://noxesole.weebly.com/uploads/1/3/4/6/134615833/4958423.pdf
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5fd2eb264c972.pdf
    • https://cdn-cms.f-static.net/uploads/4470679/normal_601eb68f8710e.pdf
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/patepowalivebi_weluvog_nigurudo.pdf
    • https://cdn-cms.f-static.net/uploads/4391037/normal_604493097eff9.pdf
    • https://cdn-cms.f-static.net/uploads/4388412/normal_6045c6c0bda40.pdf
    • https://bemakidej.weebly.com/uploads/1/3/0/7/130739127/ledofalerakesale.pdf
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/7ce60858.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a7832227-59db-4ce7-a193-52d99b913bf6/xisebikabesejoliloj.pdf
    • https://uploads.strikinglycdn.com/files/f9d23343-dfd6-4cd7-8ca1-22e46193b691/is_irish_and_scottish_the_same_language.pdf
    • https://uploads.strikinglycdn.com/files/54a4c377-7ae8-42ac-ae8e-463901002ffa/50213122158.pdf
    • https://uploads.strikinglycdn.com/files/11080656-8e7f-48a4-9d7c-5f9e15a0705d/16924952002.pdf
    • https://uploads.strikinglycdn.com/files/89638752-b8b1-41b4-8b20-281274a56b8e/wirazu.pdf
    • https://uploads.strikinglycdn.com/files/300ac270-c3f1-4c9a-95b1-88a5e9679b16/p90_workout_plan.pdf
    • 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_off0000edd2.bin
a55299ae6af128740347fe5550ae9ebfe04b6a30402286055e9fe3f053fd634c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 5396 bytes
font_01_sfnt_off0001000d.bin
ff6ea29c0497d5cc1cd50266b7343143941265cccf53513b5c2213e8efebe006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1000D 10768 bytes

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