Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cdc256163e4fbdc…

MALICIOUS

PDF

85.6 KB Created: 2021-03-08 22:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 593a86ca463b569f9c3b9fe269fe75b5 SHA-1: 79e7f4eb1a84b9954c449a4ede7b328414368c81 SHA-256: 3cdc256163e4fbdcb5710c4fdcf046038d5471ec624e3cb706d57289410c1612
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with several pointing to potentially malicious domains like xezojetit.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/strik?utm_term=white+christmas+movie+cast PDF link annotation
    • http://podcard2020.site/yamaha_outboard_service_center_near_meehpfl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386349/normal_5fc9165638fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_600f4641dd8ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410004/normal_600612aea85ff.pdfIn PDF document text
    • http://naturapple.space/vavaxumedivk3xj6.pdfIn PDF document text
    • http://static-get.top/metrologia_carlos_gonzalez_gonzalezuo9e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_5fe98370ef6a3.pdfIn PDF document text
    • http://visiblawty.com/software_architecture_resilience_principlesl7w7n.pdfIn PDF document text
    • http://mybatut.store/213849912981q0db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454184/normal_5fcf14f2783fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/savukojubusum/new_bollywood_full_movies_filmywap.pdfIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_7e8329c6c0794292998fc0e56c192324.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/027a55f3-b909-4f85-94b4-bd1f4bba3e0c/are_samsung_tvs_bluetooth_capable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33919c6a-ed89-49a2-b14b-8ffc19d023ff/journey_to_the_west_the_demons_strike_back_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/disuvaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63400a42-ec54-4653-93a7-6c475430383b/vuvora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/123d6533-59e7-4ab5-b8c2-1c9704506b47/xadiruxopudalopox.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/mufolezotetadujedif.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_3e0b2eb3b1a1497e88983fd11ebfcaf7.pdf?index=trueIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_eae2901dff534a8d8fb5136d0369799e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c308a62a-9e86-47cb-8319-e3677afb678e/how_to_make_ro_water_drinkable.pdfIn PDF document text
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_91b022bcf98a496ebaab3f5892f97fbd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 4764 bytes
SHA-256: 678f2fc030a996397c916bba44bb799359b31de06ca5a3cc39ab48855f48e823
font_01_sfnt_off000114c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C3 11192 bytes
SHA-256: 87f5aa12b1cc270f8a3a403c2addfe90b65402f4d51fe0bc2f26bb886caf241c
font_02_sfnt_off00013b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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