Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9ddeaa013e72ec…

MALICIOUS

PDF

95.5 KB Created: 2021-03-09 08:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1588e86fac64095eddbcb2860ff1d518 SHA-1: d63f067be2ce7f56bc21a756afb132b33c02106e SHA-256: 0e9ddeaa013e72eccc8cda1fa76cee826239e05dde9b97253258610deaddab0d
126 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the structure and URL patterns suggest the document is designed to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://fokemale.ru/award?keyword=ar+11+7+pdf PDF link annotation
    • http://vekisonoloze.sportsontheweb.net/leading_change_adding_value_harvard_reference.pdfIn PDF document text
    • https://mufuwavujove.weebly.com/uploads/1/3/4/0/134042856/ropif.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/80221985479.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/25742276193.pdfIn PDF document text
    • http://bagidopivulo.mywebcommunity.org/wimbledon_open_2020_winners_list.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/lasetogozajafupolajix.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/dell_optiplex_9010_cpu_i7.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/40615739599.pdfIn PDF document text
    • https://biwusudixibel.weebly.com/uploads/1/3/3/9/133987636/479478.pdfIn PDF document text
    • http://buybritishcat.com/application_for_schengen_visa_italyynmey.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/ego_lawn_mowers_for_sale_near_me.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/stranger_in_a_strange_land_outer_worlds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_6bafa43e1cf0459d835803dcf5a2cfdf.pdf?index=trueIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_70de9d5687f040d289c8f6dd12f84851.pdf?index=trueIn PDF document text
    • http://kapirexazi.onlinewebshop.net/lojepinaluwur.pdfIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_1e51a806d33a4f8b925106fc9d94fea0.pdf?index=trueIn PDF document text
    • http://nejesezape.myartsonline.com/poriwoxumisawado.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_e2fd0cd93cc042c0ab8fe8b7c8d601c6.pdf?index=trueIn PDF document text
    • http://zejibanunepi.myartsonline.com/novimojesitewepowufibomuk.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F4 5948 bytes
SHA-256: 9b2bd986e1d5b99f541e66db08784e7777d7875627fe657bb488878646f26ad1
font_01_sfnt_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 4736 bytes
SHA-256: 2aa5faf7cc06155b7f193b029d1e0131b8109ba339c3ddb4206ccdb1471ad69c
font_02_sfnt_off00012aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAF 15224 bytes
SHA-256: 4a1819810dc5a262900afd8e9fc0e3b30fd99e5492832e560bafcb49490619e7
font_03_sfnt_off00015a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A75 16344 bytes
SHA-256: cafe43f168a567f9c6776882ae0838eaf7de61a5d4c2ded21b8c8cfa4c518a15