Malicious PDF — malware analysis report

Static analysis result for SHA-256 07aad79dc35ec833…

MALICIOUS

PDF

104.3 KB Created: 2021-03-17 01:08:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 99dc1bb1738be1f35c9ef0b2ec8942d1 SHA-1: 5ba3b33c7b2cab18b128c6c571883750c04b372e SHA-256: 07aad79dc35ec8337cb3c3ab360663d6b11159846789041411ea13a7e599f84f
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 0.9994

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://lozipotod.ru/strik?utm_term=what+are+transition+metal+oxides PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451217/normal_6028fd030ba6a.pdfIn PDF document text
    • https://xilonoro.weebly.com/uploads/1/3/5/3/135314978/960921.pdfIn PDF document text
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/rabitomezuki-gugekakal-guxel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_6045f519c2974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390097/normal_600a7e17d6a87.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/philips_respironics_bipap_auto_sv_advanced-system_one_with_humidifier.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_6047221bac09e.pdfIn PDF document text
    • https://pivubetipu.weebly.com/uploads/1/3/4/3/134328131/4096084.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/3022401794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490269/normal_604b2d6e370e3.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/teneponokuluxekoneruremam.pdfIn PDF document text
    • http://rulajamizap.getenjoyment.net/7_wonders_of_the_world_in_urdu.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/2f16e885-c85f-4ea9-8c96-5644294175ff/staples_canada_shredder_bags.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76f82a7-58db-44ba-8656-739b7c1b6be5/totufefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22823fbc-7d40-408f-82bc-879c6023c9f8/74732781513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/363b07e9-6779-4ba5-9d48-60748ee1d69a/32525287392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f861b059-4413-491a-8c8d-9219b4320afb/luzivevapewilofavepebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0863dca7-4ca7-4118-8e81-c739094468b5/how_much_salt_to_put_in_kinetico_water_softener.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/monusuwura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da80cc8d-62a0-4e99-b084-a00314d14628/divina_commedia_canto_6_paradiso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000144ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144AB 5148 bytes
SHA-256: 1c409dc486cb5ca479a52f2ca4ef4d1c19bcbd90523e8bb7123c7e49da3cd930
font_01_sfnt_off0001560e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1560E 11612 bytes
SHA-256: 83675a6405a9b7d02d5189e3363b1765dcf13f157041ead984c0100099dae9ea
font_02_sfnt_off00017def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DEF 16108 bytes
SHA-256: df002dda48ffbc6f6385b7668b64d3af09f68fbc2da909ce735eb4157b56ef59