Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86768a2f2fdbaf8…

MALICIOUS

PDF

78.1 KB Created: 2021-05-08 07:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 97dc6841edbc89cb74bd91043c4e362d SHA-1: abed794a62dcace36b85510c7a1d0c208c1dd3bc SHA-256: d86768a2f2fdbaf838243b11ced03ccd715a546fb6316ba7156bca37fae3e510
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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://jumiwimov.ru/strik?utm_term=how+to+setup+d-link+dcs-930l PDF link annotation
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/5275733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413978/normal_6061c1c5947b0.pdfIn PDF document text
    • https://bonomomu.weebly.com/uploads/1/3/0/7/130775928/xaponar-dilewo-foxida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_6007f15044087.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426686/normal_5fca874a61d75.pdfIn PDF document text
    • https://guxitodek.weebly.com/uploads/1/3/1/6/131637279/4009400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_604e1a91a34f5.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/17957116693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486045/normal_5fef4c61ccfe6.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/chamakam_kannada.pdfIn PDF document text
    • https://xugojegisonixen.weebly.com/uploads/1/3/4/6/134684264/xajomed.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/free_printable_blank_bingo_cards_for_teachers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445881/normal_5fdbe1486e6e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_6034c75fb34bc.pdfIn PDF document text
    • https://pazerutafu.weebly.com/uploads/1/3/5/3/135392620/5102517.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/171252d1-11cd-495b-8c39-e27606accd4e/john_deere_riding_lawn_mowers_for_sale_near_me.pdfIn PDF document text
    • http://bupagiji.epizy.com/b_com_hons_10_year_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d841b23-0fe8-4bfc-8aa6-ae8138f9f7d5/63328743474.pdfIn PDF document text
    • http://rotodeperev.rf.gd/chrono_trigger_ds_100_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87dc37f-e146-4ae6-b943-a69b299a7f70/ver_el_amor_en_tiempos_de_colera_pelicula_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd46876c-2d81-4c8b-afec-b327c4ef5a03/suporufodi.pdfIn PDF document text
    • http://duxiwosozudut.epizy.com/what_stretches_to_do_before_a_workout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67f424a-19c9-4a70-9766-1195bcd8c903/detepajakaboxanu.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_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 5372 bytes
SHA-256: f2b2f8aa33b188a712f4a016f62d3adb279687b090cd73c21891f9c156d87bc8
font_01_sfnt_off000100db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DB 12008 bytes
SHA-256: 5cf2917bb5948c01f0aab037428564745135bd8806eb1246ab53362975032beb

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