Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd609b085fd930a…

MALICIOUS

PDF

77.3 KB Created: 2021-03-18 21:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9a281ece3ac86887336ed05324b44a1b SHA-1: fac730e0fd96d674341fd39d776b1c4e1542ccf7 SHA-256: 3dd609b085fd930a6611dfe49239744e82c2d92c36f3ca9a8fd72ec398813f47
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=python+dictionary+add+key+value+pair+dynamically PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5fdb609d94009.pdfIn PDF document text
    • http://springital.fun/aditya_varma_bgm_ringtonet5g58.pdfIn PDF document text
    • http://filfex.ru/mobizewif59v9.pdfIn PDF document text
    • http://jezakomesudo.22web.org/11907974847.pdfIn PDF document text
    • http://mananeje.66ghz.com/wapesukonebumadom.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/28360813184.pdfIn PDF document text
    • http://kunutudusoxa.mywebcommunity.org/67199290227.pdfIn PDF document text
    • http://macsk.space/18628918373cz27x.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jbidS8M/escape_girl_room_level_7.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/JKNiisf/the_great_courses_plus_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5fc96feb0fa32.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/dgebifz/p_house_party_pooper.pdfIn PDF document text
    • http://fezufizibum.mypressonline.com/how_to_check_hidden_pictures_on_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/kamavedes/h7LkVgc/77447167545.pdfIn PDF document text
    • http://wamabivunufoteg.medianewsonline.com/cara_membuat_surat_lamaran_kerja_di_android.pdfIn PDF document text
    • http://bilkan.fun/leaves_from_the_vine_violin_sheet_music2nbjp.pdfIn PDF document text
    • http://barbanapoli.moscow/fodoxomumapibusi30i6x.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/7ib7ibH/degad.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/craftsman_edger_blade_9_inch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493209/normal_60198ade997f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://judafigot.rf.gd/kovozajogis.pdfIn PDF document text
    • http://denuvifateve.epizy.com/online_cloudformation_template_validator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78979376-f18f-4c50-9e05-50a28dff5291/control_system_engineering_bs_manke_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bccb0ac-330d-4c1b-8149-dc736a142b17/song_of_solomon_quotes_about_singing.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_off0000eea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 5360 bytes
SHA-256: a8d6eb908c3d09fe266a8e8af6c59b623a980d2ce879a75a6c7d9fb123282790
font_01_sfnt_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 11336 bytes
SHA-256: e55f480e9e6e0cbb4a3cd1e8efa699c9aa79012b66458e4345a3429b59f5ed63

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