Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0ede720ee3813e…

MALICIOUS

PDF

76.3 KB Created: 2021-04-07 22:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 495b7491e7cc798beb306a35bb6ac132 SHA-1: 5852aeb1f88aaea8b07d475e164fa24c715ddcc8 SHA-256: eb0ede720ee3813eb59f86bbde6fe7634951b12feb401552dcd8146a9fac9c05
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/strik?utm_term=sunbeam+sqh310+parts PDF link annotation
    • https://paludiwebi.weebly.com/uploads/1/3/4/0/134012690/kitanu_namunaz_risetozofomi_mimumosupoxome.pdfIn PDF document text
    • http://nexipufogavajid.getenjoyment.net/application_octet_stream_php.pdfIn PDF document text
    • http://koolmaxt.online/28637319309rh9yx.pdfIn PDF document text
    • https://cdn.sqhk.co/kavatupopum/Iggiim0/bidefevipusanewerataziliz.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/18631483393.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizajo/bgjhayl/tarawo.pdfIn PDF document text
    • https://cdn.sqhk.co/xobetetivuzi/jchbBir/swan_lake_theme_sheet_music.pdfIn PDF document text
    • https://janososa.weebly.com/uploads/1/3/5/3/135326085/9416675.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/hbd5j4P/lerigigizav.pdfIn PDF document text
    • http://jakor.pro/what_are_4_examples_of_density_dependent_limiting_factors0g7vl.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/10618974332.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/tilusalaxemuporuwitoralom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_7356165cccdb495583e95d38619c5282.pdf?index=trueIn PDF document text
    • https://0c1adbbe-b65a-4c28-9da2-87cea21e0636.filesusr.com/ugd/496951_827771b5f0b44d0380c6aa6202d8a985.pdf?index=trueIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_d0b6be08bfe44acea15b818bdc7beada.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_20fefa504b64405985b58dcf008802cf.pdf?index=trueIn PDF document text
    • https://26aaa629-0581-4e25-ae32-a194504e59ab.filesusr.com/ugd/2d4e87_8a511ddc09b24301adf6761d74e2b970.pdf?index=trueIn PDF document text
    • https://9169454a-6e45-4b39-89c4-5cd9bf0a6084.filesusr.com/ugd/32fbc8_551ede83f4ed4af9be06d4b6333b788d.pdf?index=trueIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_02dce61e2c2a4b6cb9091e375a56b50f.pdf?index=trueIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_278f553bc17c4e07baf5163ac56ef804.pdf?index=trueIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_6b2b08b658f24a2b8535bc96df5086fa.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_off0000e9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F1 5752 bytes
SHA-256: ec9cbd1b409c63151111a92630a219d259a68f154f7fa0f8b2e50828dbe3a4dc
font_01_sfnt_off0000fd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 11536 bytes
SHA-256: 75616f93a1f060a7b614365e5828490776fbb2c8342702cd1916728b13fa2273