Malicious PDF — malware analysis report

Static analysis result for SHA-256 326afbd5946d942a…

MALICIOUS

PDF

74.2 KB Created: 2021-03-15 06:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6a34d6e3dd360d2e4d6b76601c5a44a1 SHA-1: 7f7625cb5696fd04bc3cb30abd5138d1c51ac763 SHA-256: 326afbd5946d942ad3715d6109fcfd8043ff01498822e532276e6326e57176a4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 disposable hosting, suggesting a link farm or SEO manipulation scheme. The presence of these links and the overall structure strongly suggest it's part of a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://leonvi.ru/strik?utm_term=advantages+and+disadvantages+of+mixed+economic+system PDF link annotation
    • http://vir-tus.com/nimupuzoburelovepitudike7r9jk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447437/normal_6004415683e14.pdfIn PDF document text
    • http://24goodstore.site/breeam_communities_manualmee9d.pdfIn PDF document text
    • http://azakalaza5.xyz/vivitar_283_vs_285hmeax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500444/normal_5ffea3e6e7188.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/ejemplos_de_molalidad_ejercicios_resueltos.pdfIn PDF document text
    • http://options.expert/kizolijenikigipij9we6r.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/pdf_file_format_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_c90940c447e64ce49615fa07d6910d0e.pdf?index=trueIn PDF document text
    • http://jadivepijuga.myartsonline.com/16959300002.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_22a2b86a3631432bb7614b5670717af5.pdf?index=trueIn PDF document text
    • https://eae964be-cf9f-49a8-9b2f-00020d526acb.filesusr.com/ugd/e932cf_b2e8679e180f4e64b6df0da812c59ad9.pdf?index=trueIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_8f54e32745ad4e2ab2d8091823afc49d.pdf?index=trueIn PDF document text
    • http://namakanexir.atwebpages.com/how_to_service_trojan_golf_cart_batteries.pdfIn PDF document text
    • http://ropupifalapoges.atwebpages.com/44314057648.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/vuvodi.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_c8ae753eb4b24566ae8a3929473ab097.pdf?index=trueIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/39483651881.pdfIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_f10b832194d045d6b9ce7048108c0f5d.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_off0000e64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64F 5432 bytes
SHA-256: 56a81b375140096f65ff85f50583f593d2bcbbc36f3833936f28052983c3e003
font_01_sfnt_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 9976 bytes
SHA-256: 8137a5fa7c91169d65c9d905e0b4f925e405452b0ee1c39a603889a11e2a3b42

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