Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eafacd974d16dd0…

MALICIOUS

PDF

74.8 KB Created: 2021-04-02 21:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 47d6783d898452f16fbdf2dca029c593 SHA-1: ee08b8dda0a8bab34c80cccfd27710da43ce48c5 SHA-256: 2eafacd974d16dd0aec9f6f9a6d1c43b8313bd18c3dc6bd7d058a0171683b2e6
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 0.9991

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://resalured.ru/123?utm_term=ifrs+balance+sheet+format PDF link annotation
    • https://wewuketis.weebly.com/uploads/1/3/5/3/135327502/faxulidosebulad_sixoparofipof_javosiwubiv.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/4432984.pdfIn PDF document text
    • https://cdn.sqhk.co/ropikenetu/fM5iblR/spreaker_studio_start_your_podcast_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/djegdsG/kutamow.pdfIn PDF document text
    • https://cdn.sqhk.co/faserekino/8ibVYii/padex.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/ihBheu9/45092178154.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/19b688a5.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/lGhcFwQ/robertsonian_translocation_a_deletion.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/cRibifo/silegopulaweri.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/ghJhSgh/perbedaan_selling_concept_vs_marketing_concept.pdfIn PDF document text
    • https://muwunijika.weebly.com/uploads/1/3/1/3/131398004/bagekawak_koturitixu_rajatotoso.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/hhAgEFR/anime_stickers_for_whatsapp_free_wastickerapps.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/gjgJaOq/ablebond_84_1lmit_datasheet.pdfIn PDF document text
    • https://zunodeni.weebly.com/uploads/1/3/1/0/131070331/3905311.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/SOgiQFX/most_free_kick_goals_in_football_history_2019.pdfIn PDF document text
    • https://pikotawikeju.weebly.com/uploads/1/3/4/4/134496208/tolabefiguvolus-sekudipiwokivu-jagumulekolevi-nukamep.pdfIn PDF document text
    • https://karubidodofibe.weebly.com/uploads/1/3/4/3/134316277/bumizuxi-xanupexemuwab-jonujubatuxuwo-ruxomanapuromuz.pdfIn PDF document text
    • https://sudarixadozitot.weebly.com/uploads/1/3/5/3/135331315/69321.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/f55a2270-89df-4b85-8b5d-9a507320522f/puguwajunupim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38a95c7-4450-4660-bb2d-2ee8a31d1bf5/vofabizaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4cb0a46-4efb-4e98-8ad9-0f6040d4359f/80805968094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd5a0af-9a21-4d85-9482-f2f9718b8ed6/47479375799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97db1bd1-6a1c-4f03-972e-010f2849c8af/microsoft_visual_c_redistributable_package_for_visual_studio_2015_x64_download.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_off0000e78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78D 5196 bytes
SHA-256: 10ab8ca8cb77d2f831954a6e629463fcc76e0f7fb51a101630ced1a5527c99cf
font_01_sfnt_off0000f912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 10808 bytes
SHA-256: f6b2e6197a834e173cf7b6437e84cc58b5fb086d5835b00d0571f51190739d16