Malicious PDF — malware analysis report

Static analysis result for SHA-256 11568613747eabe0…

MALICIOUS

PDF

79.4 KB Created: 2021-03-24 19:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 32751aa1c9cbe501f5ff872b4697663b SHA-1: 8fcf483e509cf3993b121256c9b474e196e66feb SHA-256: 11568613747eabe00d3d135d8e38eaf2bae756367bb26129dbd512abf0d5a641
186 Risk Score

Malware Insights

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

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 0.9967

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://xezojetit.ru/strik?utm_term=adding+and+subtracting+fractions+with+unlike+denominators+free+printable+worksheets PDF link annotation
    • https://wosabawa.weebly.com/uploads/1/3/5/3/135390578/8103245.pdfIn PDF document text
    • https://ledapenilodaro.weebly.com/uploads/1/3/1/0/131070651/jegimowijer_zelizazo_jobolopu_pukobonaf.pdfIn PDF document text
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/kemujoziwebedowup.pdfIn PDF document text
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/wigenemegasubi_jenetoz_mowamidigem_jotovagiremonov.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/810709.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/61824530851.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/jodi_picoult_my_sister_s_keeper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a8b6c7-2262-47c4-8e76-e140e2959b32/mimubojamemowevaz.pdfIn PDF document text
    • https://81d89a68-18ac-4cf1-ad00-ddd5d2f7da41.filesusr.com/ugd/ed58ef_c4ad7e003cd64705be84aee070a1defa.pdf?index=trueIn PDF document text
    • http://rigagidepa.epizy.com/xenipuravo.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/a_first_course_in_abstract_algebra_free.pdfIn PDF document text
    • http://dogefifuga.rf.gd/search_video_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580fa89f-7514-4e38-b818-69996e16c620/how_to_convert_graco_to_booster.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/66404055372.pdfIn PDF document text
    • http://sebokegekesuded.atwebpages.com/tesakufora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38ce5fb-55b9-4531-9ac7-c08baecc1a0e/html_code_table_column_width.pdfIn PDF document text
    • http://xiwexuxe.atwebpages.com/hamilton_beach_coffee_maker_k_cup_not_working.pdfIn PDF document text
    • http://lijulipewagikev.rf.gd/40865880279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e40afd6c-0771-454a-ba11-71472244a2d3/4387200577.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_6ee05088ea0e4052a001f56ad69761e7.pdf?index=trueIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_9dcd6e198d66484f8f63ba178a8caa11.pdf?index=trueIn PDF document text
    • http://toramowajo.epizy.com/pros_of_school_uniforms_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/whatsapp_plus_6._88_apk_2019.pdfIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_7105d2b82613444e97c583c37c9b27b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/imagen_de_carita_feliz_animada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e52642d-5188-4754-af1e-cafc7426f576/how_do_you_set_a_digital_timer_for_lights.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_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 5856 bytes
SHA-256: 523f5d739d058d389908853935eea1adcc549170615d0be50b7981210adbbbd7
font_01_sfnt_off00010a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A51 10680 bytes
SHA-256: 276627ccd5edba43068380f20c3f02ddfe202eab8ac29921d5ed8ecb3c9e5ec4