Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d5faea83c6072a…

MALICIOUS

PDF

102.4 KB Created: 2021-03-11 01:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9a387fb8509229603baba8f6e0832ea2 SHA-1: f51d47ba3be2368d30294f4e214c3538c304c9b6 SHA-256: c3d5faea83c6072a2527c0e1cc2c5b3d51aa86593945a1788fd09ce594ad65e8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'resalured.ru' which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://resalured.ru/wix?keyword=diferentes+tipos+de+maquinas+de+coser+industriales PDF link annotation
    • http://i-men.ru/free_bootstrap_templates_admin_dashboardoa8t2.pdfIn PDF document text
    • http://terem.space/formula_3_2020_driversa5sor.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/58149792486p7vmx.pdfIn PDF document text
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/6596626.pdfIn PDF document text
    • http://kirerazunesamip.22web.org/8222049600.pdfIn PDF document text
    • http://artdebug.site/cubo_magico_formulaswe3r7.pdfIn PDF document text
    • http://dirugalaw.22web.org/du_battery_saver_pro_apk_2019.pdfIn PDF document text
    • https://minedikatew.weebly.com/uploads/1/3/0/7/130739540/katoravidataj_xomopaf.pdfIn PDF document text
    • http://coolstudent.space/89977704414yrpya.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_a0536e84f370450f8a0a4dadf1f5e386.pdf?index=trueIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_2363dca45ef7412085bc1ef6eee2b9c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/banomoya_music_video.pdfIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_85b4b0958edc41ab8d2e257f17017c32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/56955148988.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_63bb64d2ada348b8956eac383e27c27d.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_72329302bd504059b47ccfdccffc59a2.pdf?index=trueIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_37d951d604624ffa8550f1abf59e894c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/golden_song_season_3_facebook.pdfIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_fb705bdd6e804dcbbc5b7d2159a0e16c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/bootstrap_studio_components.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
    • 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_off000131d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D0 5428 bytes
SHA-256: b70c8d1be2fb3e64595ad4d36af6eb1d2fb99cdb6c59a3512dcd9a78a3286714
font_01_sfnt_off0001442c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442C 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00014cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CBC 11528 bytes
SHA-256: f090ef9867f7ea7200532b5dadf1e12c1969de6eefe2724678dd9111418941b0
font_03_sfnt_off00017273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17273 16368 bytes
SHA-256: e19c2e890c2ca05803eb2e56983a995bb0c55fa916207d025891136e591fca3b

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