Malicious PDF — malware analysis report

Static analysis result for SHA-256 98509e09b4020235…

MALICIOUS

PDF

77.5 KB Created: 2021-03-25 15:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8bb0b4c600e310de77ce73449e1efb61 SHA-1: e6a8fad17ca4b2190d5391626695495ff95abce3 SHA-256: 98509e09b40202352a45e61c2f7afa8411c9ee8c2aac5d936e7e012011931f4f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with at least one identified as a potential redirector. The primary purpose appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://leonvi.ru/123?utm_term=bemanningsavtalet+2017+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5feb987d81c62.pdfIn PDF document text
    • https://mezovojexojija.weebly.com/uploads/1/3/0/8/130874002/05538c5.pdfIn PDF document text
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/puzaragibap.pdfIn PDF document text
    • https://zutiwemozebej.weebly.com/uploads/1/3/2/7/132712207/pufekiwe.pdfIn PDF document text
    • https://vilegewadaw.weebly.com/uploads/1/3/5/3/135324537/6577579.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/9375400.pdfIn PDF document text
    • http://copyrightproblem.com/ice_hockey_stats_sheethh08l.pdfIn PDF document text
    • https://mepifinifiwiza.weebly.com/uploads/1/3/4/3/134334375/jukovizag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_6046565762649.pdfIn PDF document text
    • http://raftgjgr.space/85191474185qby5g.pdfIn PDF document text
    • https://wuluvaxezipow.weebly.com/uploads/1/3/5/3/135393263/8703223.pdfIn PDF document text
    • https://befugusugub.weebly.com/uploads/1/3/2/6/132683140/rirepadoridi.pdfIn PDF document text
    • https://misapunuzure.weebly.com/uploads/1/3/1/6/131606411/mogavebesunab.pdfIn PDF document text
    • https://nujobivodiji.weebly.com/uploads/1/3/4/7/134771327/xumonoborobemepogoza.pdfIn PDF document text
    • https://rizimajapalikum.weebly.com/uploads/1/3/4/6/134633575/6f92b2c2.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/musoxifuvitalo/fifth_grade_word_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/how_to_program_directv_remote_for_toshiba_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/freightliner_radio_wiring_harness_diagram.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_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 5780 bytes
SHA-256: 740356d0cde6897a204c9fcbd2b4008e7132b34c5fc7d773fe00fe35d8912198
font_01_sfnt_off000100c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C0 12004 bytes
SHA-256: 8f00fa587c851e9305e28b12e6606917ce739c7792473a92315f8d8d65388efa

Open this report in the interactive analyzer, or submit your own file for analysis.