Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae638a9c704ef07…

MALICIOUS

PDF

78.5 KB Created: 2021-04-04 23:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7e559c41406c428808c73364f4554573 SHA-1: ea5b785f6118f1a1ee193ceb4b213e08896dc18b SHA-256: 7ae638a9c704ef0716651bb083b0ac20db2ed3ea8655f99f93515f8d850f0135
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://vilenefex.ru/wix?keyword=the+canterbury+tales+prologue+selection+test+b%252Fc+answers PDF link annotation
    • http://4gusevshop.website/90600159375x5exm.pdfIn PDF document text
    • http://rejawulomov.mywebcommunity.org/10315782603.pdfIn PDF document text
    • http://muldwych.com/78907999800n5yn.pdfIn PDF document text
    • http://beremoter.online/xavufulwkphf.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/cIaUzsL/microsoft_sharepoint_certification_path.pdfIn PDF document text
    • https://cdn.sqhk.co/nofevemumidu/flgjfow/gajopasenifugemifij.pdfIn PDF document text
    • http://mexawolin.medianewsonline.com/bfs_and_dfs_in_artificial_intelligence.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/seekers_book_3.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/R4OIUjb/97026410404.pdfIn PDF document text
    • http://centerverifybadge.com/waderuzavevasexovedewobag6j16r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_4346e039ad0a47b09f804fc6d813bb82.pdf?index=trueIn PDF document text
    • http://supajiwa.myartsonline.com/hp_laserjet_professional_p1606dn_wireless_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de062c2b-1b3a-4d42-8fd3-20d9a4d9f8b9/how_to_paint_leaves_with_acrylics.pdfIn PDF document text
    • http://fozoxorosemaxo.epizy.com/38496440891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/536a69bd-82f1-4c84-9094-a342884a8171/vupelajabipurusisi.pdfIn PDF document text
    • http://bupizaxumora.epizy.com/importance_of_educational_administration_and_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb20f385-c67a-45b3-886a-b5b21ce4bfec/78097177341.pdfIn PDF document text
    • http://nokatebikexu.epizy.com/sokebor.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_c4bb1f7ab83242afb36f4e4ecddd8f42.pdf?index=trueIn PDF document text
    • http://wupidusujimi.myartsonline.com/statistical_learning_by_8_month_old_infants.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_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 5516 bytes
SHA-256: fbc99ef0696c27fd1a770a3d00a750cb7cdd89ea7ba47bf9eed7518cf139b3e9
font_01_sfnt_off000105b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B9 11620 bytes
SHA-256: 46b0bb8215b37cf0d03a72d28fc190ca9bbcfeda5ef75edd96167a541c2e895f

Open this report in the interactive analyzer, or submit your own file for analysis.