Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd089bff8cca411d…

MALICIOUS

PDF

76.2 KB Created: 2021-03-12 21:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7a01755ab36775ee26cbb91b49191137 SHA-1: 5e9954380d8c81410f43dbec24345fc31cc14d03 SHA-256: bd089bff8cca411dd1d3e25386478a23119a2ecd7b59ae69e629b91d84201eeb
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 0.9998

Heuristics 6

  • 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 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://kuzutuzo.ru/aws?utm_term=area+of+compound+figures+worksheet+pdf PDF link annotation
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/8404751.pdfIn PDF document text
    • http://topplafond.xyz/87323678974bmqc4.pdfIn PDF document text
    • http://islandlandscapesbb.com/25749825534i69eh.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/jcslghl/stickman_legends_ninja_warrior_mod_apk.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/19476bdb5d07.pdfIn PDF document text
    • https://fewanisip.weebly.com/uploads/1/3/2/7/132712603/pifosudevar_pewetuji_pedasarak_nojeketinukot.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/ee57ea.pdfIn PDF document text
    • http://chambrehub.xyz/what_is_a_california_sushi_roll_made_ofao083.pdfIn PDF document text
    • http://boldly-grow.com/eba_guidelines_on_outsourcing_arrangements_po_polsku5xeye.pdfIn PDF document text
    • http://godevibusaxinoj.22web.org/college_of_american_pathologists_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/Caaidie/tadpole_tape_cutter_walmart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lunipadudatib.rf.gd/private_practice_season_2_episode_7_guest_stars.pdfIn PDF document text
    • http://mutupoda.rf.gd/gozimevesazixatepazir.pdfIn PDF document text
    • http://davivizuvazofa.rf.gd/aggiornamento_emoticons_whatsapp_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/kask_valegro_size_guide.pdfIn PDF document text
    • https://fb3efafe-1b0e-41a1-9434-8bf556110c4a.filesusr.com/ugd/de5e41_af3acf7b68044c528dd6095b03c81ed9.pdf?index=trueIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_4901cbacdeff417da49da67dd07169df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokofapig/41779360511.pdfIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_49d5391b71a444e9867305a05756a440.pdf?index=trueIn 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_off0000e7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B8 5684 bytes
SHA-256: f1862462b8bd53ff60a51655145efae4a2945c8fdd8d489a3ca3d00afded44a4
font_01_sfnt_off0000fb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB00 11316 bytes
SHA-256: 3dc3912e348a4f6e21f1fa9468c7f8da285cffcc76ce2bf908110f7907edce62

Open this report in the interactive analyzer, or submit your own file for analysis.