Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36a6a162e3fd51f…

MALICIOUS

PDF

82.8 KB Created: 2021-05-25 16:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e29192be0f0ecbd5536bb98f4d1436d2 SHA-1: 9f0ec00022314d08b7558b40349e579ff1a5432a SHA-256: a36a6a162e3fd51f4aaf33e1448685c16b4ff2b819fadf0b287192a99050dae9
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, specifically designed to trick users into downloading potentially malicious software. The presence of numerous external links, many pointing to disposable hosting services and employing UTM parameters for tracking, strongly suggests a link farm intended to distribute malware. The ClamAV detection and ML classifier further corroborate its malicious nature. Although no scripts were directly extracted, the PDF structure and embedded URLs indicate a workflow designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/strik?utm_term=maschine+software+download+crack PDF link annotation
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/jokeli-lutuwojikuk-joxar.pdfIn PDF document text
    • https://zedaluridafam.weebly.com/uploads/1/3/4/4/134464222/ff10cc6e67a.pdfIn PDF document text
    • https://zevenilusowaj.weebly.com/uploads/1/3/4/3/134324486/836281.pdfIn PDF document text
    • https://vifewilepame.weebly.com/uploads/1/3/4/0/134012930/1513061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5ffb6e5a29fcd.pdfIn PDF document text
    • https://levufiturosotin.weebly.com/uploads/1/3/4/4/134466711/a1d4eed2a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368997/normal_5fef030d430fd.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/be331.pdfIn PDF document text
    • https://gezifizisosuvul.weebly.com/uploads/1/3/6/0/136050083/f8e8bf198785.pdfIn PDF document text
    • http://geags.com/19h9cqIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5c1bea-59ed-4d6f-aacd-579a9e73f400/takeninasufifobesaloli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf44769-40c0-4e71-a150-37d05fb1c9a5/dular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d4f987-d806-46ca-8143-7304105ece4e/twilight_saga_full_movie_in_hindi_download_mp4moviez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70bd132-451d-4b49-98a1-8b95b3330ffd/54533800756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd6e896-ff26-40fb-8846-f2fd00e9c2a3/how_to_write_a_resume_summary_with_no_job_experience.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/66427536170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb593c7-1cde-4d72-9fcf-32301dcc84fe/carl_rogers_person_centred_approach_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/13763814974.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/castrol_magnatec_0w20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b85cdea-d1b3-4a02-baa8-270ed9c16d4f/guns_germs_and_steel_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0091974c-def9-4f1f-926d-09d447a47805/city_project_geometry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c6092a-4049-4f46-af81-f8029be68ad6/bonozonekinol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e334cad0-be01-43c2-ba68-f164bcca685e/75766510943.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 5272 bytes
SHA-256: 5518367efb5d3ed8e3ba44585d38f0f42479c9af52db59a08e341fdf62e02af1
font_01_sfnt_off00010040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10040 10800 bytes
SHA-256: 627e950206148a750354cc67e85688776f2f4af19a6b0e9b735d4bad7b8b63ce
font_02_sfnt_off00012590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12590 17008 bytes
SHA-256: 928723b72d7c3b4d6f0273b550401adf6b50c98a6488e2a354498e2a397af5ed

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