Malicious PDF — malware analysis report

Static analysis result for SHA-256 703f5df4ee569026…

MALICIOUS

PDF

76.9 KB Created: 2021-03-20 12:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7cf78ba62ba68960fdf3c583fb720f63 SHA-1: f8b4ea1773ba20cb7f2483278ba60a4b910755f6 SHA-256: 703f5df4ee569026442c26c76c55a67460434e23a203e7bd4afdead12c9497e5
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO manipulation or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary malicious URL identified is `https://midufefew.ru/wix?keyword=emojination+3d+answers+level+8`, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wix?keyword=emojination+3d+answers+level+8 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fccff68765dc.pdfIn PDF document text
    • https://jikovezogid.weebly.com/uploads/1/3/1/4/131407088/wijimujo.pdfIn PDF document text
    • https://pozemake.weebly.com/uploads/1/3/0/7/130776760/damim_xaretadoluxoro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459188/normal_5fed482c3fe89.pdfIn PDF document text
    • http://bonapimum.iblogger.org/kurukshetra_university_ba_1st_year_date_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446633/normal_5ff3a1083260f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_602a193ae501b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_491cb0f1a8804b9eb3c2ea2c5c2deb40.pdf?index=trueIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_49f0d0f0b6d0489fb327f7d933783de2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b50074-503d-4638-8dbe-4d7e2a055d3c/gorisesadupamiz.pdfIn PDF document text
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_1e5a0edb7fe341c9bec9b4f92d69cf9a.pdf?index=trueIn PDF document text
    • http://domawodevanaga.rf.gd/qualitative_data_analysis_steps.pdfIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_e859e12a04cf4d52b73bd387b327ed2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/734db7f3-6338-4fb4-a18a-69dc833f2206/61442497248.pdfIn PDF document text
    • http://gebuzabode.epizy.com/15455478209.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_4f07ea86231843618ef1b1995dedee55.pdf?index=trueIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_42e68ba3a229429b90ef458652f4c1c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ebf5ae5-42d5-4945-9aaa-51f9a36b8b87/wepuvujowavivoxuderili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf8e2ce-5ff9-4e4e-b0c5-33b26b3c0c22/introduction_to_management_science_13th_edition_ebook.pdfIn PDF document text
    • http://mabazekow.epizy.com/poisson_distribution_mle_variance.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_a4ed9afa574142279d7a2c98f9921639.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_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 5512 bytes
SHA-256: 5ae83995f92e558d369ae5ee2361e7ebaeeca1a8b09202bdb1864d677909735d
font_01_sfnt_off00010105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 10580 bytes
SHA-256: 3b8850860f614a8500fdce2a801a801505afe0c7287bfb5e9e243bb10b222c08