Malicious PDF — malware analysis report

Static analysis result for SHA-256 67875cf869958014…

MALICIOUS

PDF

76.3 KB Created: 2021-03-28 12:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cf5462dca01190d5ef559475df612630 SHA-1: 831e731dadc7b0231cae9bc4b9558f35042ab833 SHA-256: 67875cf869958014d3e05ca246f382b00807c02bc9d226a7acbe915acee7247e
126 Risk Score

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 0.9949

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://leonvi.ru/123?utm_term=eres+tu+maria+episodio+9+answers PDF link annotation
    • https://cdn.sqhk.co/vavetiset/Mfgjiyk/bovril_drink_nutrition_information.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/higiihR/basketball_3_pointers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_60502bf82ccb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454277/normal_60068fb140383.pdfIn PDF document text
    • http://golifidisonopat.iblogger.org/10th_step_inventory_form.pdfIn PDF document text
    • https://cdn.sqhk.co/jepogedofuz/jczjfuv/duet_songs_2019_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_6039354e2104f.pdfIn PDF document text
    • https://cdn.sqhk.co/gesuxafom/tgcCFuX/89252844966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_6012275765675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_6019b029e5e00.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/lhhxQX4/zombie_apocalypse_guns.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/commandos_2_android_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_b8ec23b0b0c14a06aa5b53d795471d1f.pdf?index=trueIn PDF document text
    • http://vutitogox.epizy.com/beyond_aquila_rift.pdfIn PDF document text
    • http://junotilunam.rf.gd/10083754981.pdfIn PDF document text
    • http://saxefixuk.epizy.com/fexisizonapozoxug.pdfIn PDF document text
    • http://terekeduwowe.rf.gd/wodebixevibox.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/zaxeburexabivususezowe.pdfIn PDF document text
    • https://9e6c4f0b-3406-4274-bf8a-5be7f948d240.filesusr.com/ugd/45c6ff_2a42a07299684afab5dbb6b97ef66d70.pdf?index=trueIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_ba3318182503423fa15dd5db753516a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/salesforce_create_lightning_email_template_folder.pdfIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_8f37bb639a2648dc836c84fe92161a19.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/jawugutisogorek.pdfIn PDF document text
    • http://zinabukupomij.rf.gd/asme_bpe_2020_free_download.pdfIn PDF document text
    • https://7737876a-f762-42ef-af6f-18b78abacabf.filesusr.com/ugd/9066bd_aa9d41114b404130aa76f5a11eb7e628.pdf?index=trueIn PDF document text
    • http://dosekidonara.epizy.com/betrayal_at_baldur_s_gate_secrets_of_survival.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/what_are_halogens_at_room_temperature.pdfIn PDF document text
    • http://zevofelajasuz.epizy.com/supasugofalulo.pdfIn PDF document text
    • http://magivuxitafexox.rf.gd/free_online_invoice_template_uk.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://quizlet.com/7263327/e2-episodio-1-%25c2%25bIn 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_off0000e877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE877 5280 bytes
SHA-256: 5d024075aa2aefc998c62d8c712a3f8272a6598953cfe9b0a40fe8404a312bb6
font_01_sfnt_off0000fa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 11556 bytes
SHA-256: 891f268bb995ddc554bca4f75fe8c5065cf5f23fc07272bbea8077a861f26cab