Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a26ce3055e0df12…

MALICIOUS

PDF

77.9 KB Created: 2021-04-07 10:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 965c1bd4b122ee68c13b19a7e97db079 SHA-1: 5356f62aa6f07a26dd96d2e2d7c48b2a2017dd21 SHA-256: 5a26ce3055e0df12c3549bf82e0df863305e205eb08ae954bfa78dd947ef91af
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 0.9991

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/strik?utm_term=bojangles+chicken+supreme+meal+calories PDF link annotation
    • http://krokoboko6.xyz/warrior_cats_games_offline3t80p.pdfIn PDF document text
    • http://sodahq.pro/jagizodofivakitelabosipnv9g.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/how_many_calories_are_in_an_everything_bagel_from_dunkin_donuts.pdfIn PDF document text
    • http://vuletotam.scienceontheweb.net/besobugukagubamorasatu.pdfIn PDF document text
    • http://uuuuull.space/budget_speech_2019_malaysiarpvz1.pdfIn PDF document text
    • http://pubggaming.online/grade_6_math_makes_sense_workbook_answersghdhv.pdfIn PDF document text
    • http://detonic-italy.website/bonding_and_antibonding_molecular_orbitalsyyzhp.pdfIn PDF document text
    • http://sexedate69.site/how_to_train_your_dragon_book_series_1_read_online_freem1ska.pdfIn PDF document text
    • http://trylait.club/piano_adventures_primer_level_lesson_book2imwp.pdfIn PDF document text
    • http://brandframeb.com/juksekoder_for_farmville_2_penger_p7cony.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/mokefetenunikuxodojatabo.pdfIn PDF document text
    • http://ooovseanalizi.ru/2006_chevrolet_malibu_maxx_lt_gas_mileage1e3x9.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/4993b5cf-dac7-41a2-9fb3-ba8cdd7d5c73/30707132572.pdfIn PDF document text
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_d73a743e64c745cc87cbec8985539daa.pdf?index=trueIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/33794002021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e00720-7334-470c-aff7-bc0cc0b6445b/uses_of_gravimetric_analysis_in_real_life.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_f6c09f044ffa46d3b133220aa6a87663.pdf?index=trueIn PDF document text
    • http://zavulelobawabi.onlinewebshop.net/tamil_roman_catholic_bible_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debc662b-a57f-4371-95e0-ceb191cb2ae2/how_to_connect_skyworth_remote_to_tv.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_5b152781a1ff4e5ab3dd392ce20de019.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_e55ad96c9dcc4985b5ba6f050b7e9c6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de4008b-7e1e-4cd6-8840-e2c6d1c0fe9e/celebration_of_discipline_meditation.pdfIn PDF document text
    • https://9e28b13d-ef5c-4d18-821e-e071a8932918.filesusr.com/ugd/0b0738_8eaa3f8f9b804000ab2757a185ed8c47.pdf?index=trueIn PDF document text
    • http://wizigipixe.atwebpages.com/fusenu.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_off0000f14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14F 5536 bytes
SHA-256: fcf99429536d2fa30e4188f6e6c6bf04f838bcb97fb0dfe30083f6363b208918
font_01_sfnt_off00010407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10407 11256 bytes
SHA-256: 0d78f6a22369324c5c8b42053aec1c4cb3dd90969b20cb88c337904fd2427cde