Malicious PDF — malware analysis report

Static analysis result for SHA-256 03068cfa50fe0faf…

MALICIOUS

PDF

80.9 KB Created: 2021-03-31 17:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dadf792aea9c956e58974c7828bd59cf SHA-1: eb9c8a13e162e48e62bae80c72da2a2063c1e975 SHA-256: 03068cfa50fe0faf1dd3f1902027a90c5f0f29f91746bc54687806fb811bb91c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, designed to mimic search results for popular PDF downloads. The primary URL, 'https://gimoguvi.ru/award?keyword=shakespeare+romeo+and+juliet+pdf+free+download', suggests a SEO link farm or phishing lure. ClamAV and ML classifiers also identified this as malicious, specifically a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/award?keyword=shakespeare+romeo+and+juliet+pdf+free+download PDF link annotation
    • https://zefemebok.weebly.com/uploads/1/3/0/7/130775969/sumar.pdfIn PDF document text
    • https://cdn.sqhk.co/supuzeren/BIuIicE/get_list_of_sheets_in_excel.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/5921464.pdfIn PDF document text
    • https://xezelugewopisaw.weebly.com/uploads/1/3/5/3/135311865/6036524.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/heDQEhf/dymo_colorpop_label_maker_not_printing.pdfIn PDF document text
    • http://kebotup.66ghz.com/online_advertisement_management_system_project.pdfIn PDF document text
    • https://zumusikibalagop.weebly.com/uploads/1/3/4/0/134096359/nivotobaladetor.pdfIn PDF document text
    • https://cdn.sqhk.co/rizuwevize/jcXjava/gutesepuvufufixaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/dqZjjgg/62167172351.pdfIn PDF document text
    • http://rarafon.iblogger.org/serendipity_flute_sheet_music.pdfIn PDF document text
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/vifikefalaze-seresabaro-zaloji.pdfIn PDF document text
    • https://cdn.sqhk.co/sejukuxa/ggifhf4/canadian_passport_application_form_example.pdfIn PDF document text
    • https://rubegibadamu.weebly.com/uploads/1/3/0/7/130738913/8012374.pdfIn PDF document text
    • https://laverikiwife.weebly.com/uploads/1/3/4/5/134502667/edd4d719993.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a402c62b-08d4-45ea-9965-e1f00a209806/nuwawadidejizinujeke.pdfIn PDF document text
    • http://lilufunom.epizy.com/9542292912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b84eef7-c66c-415d-b985-2703980c2c39/how_do_i_fix_my_acer_laptop_without_power.pdfIn PDF document text
    • http://lexepetilak.rf.gd/axis_mutual_fund_online_empanelment_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d352251e-804d-4b36-af0e-18b0e33e0d9f/nombres_para_nios_sacados_de_la_biblia.pdfIn PDF document text
    • http://laletanegimiw.epizy.com/19178862216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4869b818-e671-42ea-857f-7c4e29d43960/rerakiruwanizumebumut.pdfIn PDF document text
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_65af5991207e4e37b38531afeee903ab.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_affade366fe64e6f825c3dd6b5e54811.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_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 5616 bytes
SHA-256: ddc03cf8bc1d2c6891c5167be763eb2a6202478150436eb9acecef8fc52db1c6
font_01_sfnt_off0001113b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113B 10876 bytes
SHA-256: 6f24a0170fd3edac9c719eafa5b5f5545b9feebb31ac54d36c5f58e12f8d5067