Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ede305c248720d…

MALICIOUS

PDF

87.7 KB Created: 2021-03-19 04:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 172132ec97994d4a4f78a1dde20cd999 SHA-1: 552a299c7959d952efc6bdef45d1bca6c8a80efe SHA-256: 68ede305c248720db09a0dadfdd122e5a774f7215968ec35d91aaae581f763a1
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 0.9996

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://kuzutuzo.ru/strik?utm_term=baby+grand+piano+price+in+india PDF link annotation
    • http://bumaga.bz/helter_skelter_1976_full_movie_onlinergo74.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/nigerian_spelling_bee_words.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/7517881.pdfIn PDF document text
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/jexegekapibexid.pdfIn PDF document text
    • http://winclean-shop.space/zisupopitonevjc6pt.pdfIn PDF document text
    • http://euroshopmn.space/ambarish_kannada_songs_free0r7dt.pdfIn PDF document text
    • https://tematurulabi.weebly.com/uploads/1/3/1/6/131606540/nilitemorolu-biwuloguz.pdfIn PDF document text
    • http://motivawka.online/acoustic_guitar_lessons_easy_songssc3yf.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/tesis_sobre_el_cambio_climatico.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/zonulajuwawivosasidax.pdfIn PDF document text
    • http://raisinsapp.pro/82413143715l61j4.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/kutivote.pdfIn PDF document text
    • http://texno3ua.com/does_running_a_marathon_shorten_your_life9no87.pdfIn PDF document text
    • http://jumbochecker.com/362746786487l8tp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://8f1ef4f7-3f23-41ef-a3d6-4e5873a175a2.filesusr.com/ugd/d318ce_9d4a0fbe4f244206918366fbf888531d.pdf?index=trueIn PDF document text
    • http://kadoxosin.atwebpages.com/44948611239.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_4ffd7b32c29e401a8338320b097936d5.pdf?index=trueIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_8c25055cec6b42d09fec2b770e6b4243.pdf?index=trueIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_0ef28c427886464c89c729a2547edd3f.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
    • 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_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 5028 bytes
SHA-256: 8570a916ed5e99802cebd6423895d3b973ec52830d8378ee62fc301a525890cf
font_01_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 12248 bytes
SHA-256: 0e94cfeb4d766773e0b5c826e282279d1240427da264a5c0f08b5dff0b96336b
font_02_sfnt_off00012c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9B 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
font_03_sfnt_off000141b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2