Malicious PDF — malware analysis report

Static analysis result for SHA-256 700d553d6ff039de…

MALICIOUS

PDF

77.7 KB Created: 2021-03-27 19:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 067d960c7b05566da03897d591259227 SHA-1: f9b24ac17f224143bb36311a1e5e9283ced73857 SHA-256: 700d553d6ff039de5ebd49dd3bf7b57968d475a9d22b400ef9e6f78772016926
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document functions as a link farm, containing numerous external URLs pointing to other PDF files, likely for SEO manipulation or to distribute further malicious content. The presence of multiple external links and the nature of the detection suggest an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=the+princess+diaries+6+pdf PDF link annotation
    • https://nujobivodiji.weebly.com/uploads/1/3/4/7/134771327/pebugatorataveg-pijabaxosoz-vozasarezuzos-kibukosimij.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/gakiragivamuxenuzigap.pdfIn PDF document text
    • https://wevobuge.weebly.com/uploads/1/3/5/9/135978380/3953129.pdfIn PDF document text
    • http://gagefiwirimat.medianewsonline.com/relative_bioavailability.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/website_design_free_download.pdfIn PDF document text
    • http://vosojivaru.mypressonline.com/manual_de_epidemiologa_y_salud_pblica_panamericana.pdfIn PDF document text
    • http://joxepubevi.22web.org/mevovetix.pdfIn PDF document text
    • https://gegefajowib.weebly.com/uploads/1/3/1/3/131380265/d3342143.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_5306f650d523419ab0a7df145ab1481e.pdf?index=trueIn PDF document text
    • http://pejomozudone.epizy.com/how_much_do_xbox_one_cost_on_black_friday.pdfIn PDF document text
    • https://4407eba0-147d-4e9d-98ff-19010b67f466.filesusr.com/ugd/c1f2fd_45c8e9c4d2d748b9b42c294f43b87426.pdf?index=trueIn PDF document text
    • http://tujajolurasa.rf.gd/national_geographic_magazine_october_2018.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_dd7562fa0fd14b97939793373999de4d.pdf?index=trueIn PDF document text
    • http://gevokibip.epizy.com/54688912390.pdfIn PDF document text
    • http://vanuragevexofe.rf.gd/learners_permit_study_guide_quizlet.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_19d7e060b8f94513ab41b5fcca955b25.pdf?index=trueIn PDF document text
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_db025cc35da347bda3b8c345b8108a7d.pdf?index=trueIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_05d117a3a3df457798936fade6ed6398.pdf?index=trueIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_32cbd14b1325446695360f38cde9e471.pdf?index=trueIn PDF document text
    • https://fa0867c9-8cf0-46f9-bfae-aad8e49c21f3.filesusr.com/ugd/cdba2c_1ba07aef07b34fa88d929b74a2c8907d.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_off0000eded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDED 5312 bytes
SHA-256: 24aefccc455053d4f7796d3b3b0e673aaf395f9e9686fd8e582cf02117936033
font_01_sfnt_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 11892 bytes
SHA-256: 649007d04dca4917dac51c26beae6d56c1b21a7c34aec49fa4a80eaf0f56a7f6