Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be7a44854cdca24…

MALICIOUS

PDF

84.0 KB Created: 2021-03-10 08:04:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 991d8fa99c3936472949275877ce9b35 SHA-1: b2f6947dae9b6a44f239db4b9dddb9a0fb488b14 SHA-256: 7be7a44854cdca248e6e9960077e7988691a8f9180930f879f0d78f31269eacc
186 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. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to direct users to potentially malicious content. The primary URL, 'https://seumenha.ru/wix?keyword=enmotion+paper+towel+dispenser+59462+manual', appears to be a keyword-stuffed lure. No scripts were extracted, but the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/wix?keyword=enmotion+paper+towel+dispenser+59462+manual PDF link annotation
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/fasup.pdfIn PDF document text
    • http://zathkatow.xyz/21714699948o6993.pdfIn PDF document text
    • https://mirepabokotixiz.weebly.com/uploads/1/3/2/7/132712407/vejaf.pdfIn PDF document text
    • http://byseles.xyz/ms_dhoni_movie_themes_for_androidmerdt.pdfIn PDF document text
    • https://sazefowefojewen.weebly.com/uploads/1/3/4/8/134893887/e938dd67d.pdfIn PDF document text
    • https://xasigorokukexef.weebly.com/uploads/1/3/4/8/134891024/747c57a59720.pdfIn PDF document text
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/621607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_4541c79f235e4fcea79d4fbb1a86bb30.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52bce7e-e317-46b3-abd2-622e16325e91/movie_maker_para_windows_10_32_bits.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_4bae749f956d49a08f5941f0a57ce200.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanaladu/m._h._sc_full_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff82f576-8bf7-4a16-9407-582dce623ed2/que_son_los_libros_apocrifos_y_cuantos_son.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_aa6cae99a08b4a95af340134a3dc58cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/guarantee_of_performance_vs._guaranty_of_payment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46a2a05-2cf6-4554-af64-cb0740bda114/igcse_chemistry_workbook_fourth_edition_answers.pdfIn PDF document text
    • https://ebed6276-6372-4ddf-adad-9a0fa504b99f.filesusr.com/ugd/805d2a_2ebad8aba72045d887ac4574d30177e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/45595697753.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/cell_differentiation_in_plants.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_ee3b6d51b46d44048c2c9337c07a514c.pdf?index=trueIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_ce7695370a194760a7232abddbd452c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/11602197055.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_a4b1465037144af9a439a62accb94f11.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df48cbb-bed4-4e2e-8c21-e5f3bc878498/92225461553.pdfIn 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_off000109cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CD 5808 bytes
SHA-256: aee16c6fb2cf4852c3175e384f28d6233abeb75425acea95abf8b5d6eea52011
font_01_sfnt_off00011d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8D 10732 bytes
SHA-256: 5496b035ae60890e9dbb84cccdfa393bf3c0022203d94e8546c4a8e559efebdf

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