Malicious PDF — malware analysis report

Static analysis result for SHA-256 10643e94035d80ab…

MALICIOUS

PDF

78.5 KB Created: 2021-04-25 04:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 597f596b23298b1293ff3459a0857ae4 SHA-1: d6f3dff25bf86f90149763b346743bb57db88407 SHA-256: 10643e94035d80ab87fe5d58ad42274eb98691c75a8558287114dad9fd09636f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pattern. The embedded URLs suggest an attempt to drive traffic to potentially malicious or deceptive websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=le+petit+prince+english+translation
    • https://static.s123-cdn-static.com/uploads/4386091/normal_5ff53b0481f77.pdf
    • https://kiluzamomumu.weebly.com/uploads/1/3/5/3/135344913/faleb.pdf
    • https://cdn-cms.f-static.net/uploads/4504870/normal_6053bbb95c91e.pdf
    • https://cdn-cms.f-static.net/uploads/4451044/normal_604bbe1b75c03.pdf
    • http://salukapebuke.iblogger.org/dosage_of_metformin_for_type_2_diabetes.pdf
    • https://jolefopasovoja.weebly.com/uploads/1/3/4/4/134402584/6293481.pdf
    • http://mewebewenuzotez.iblogger.org/the_book_of_enoch_with_yahwehs_name_restored_audio.pdf
    • https://jodajapiguzok.weebly.com/uploads/1/3/2/7/132710756/vojomezera-buralapizazip.pdf
    • https://static.s123-cdn-static.com/uploads/4390051/normal_5fe30c2eb64bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tadevewuju/how_to_use_tubular_lock_pick_set.pdf
    • https://uploads.strikinglycdn.com/files/02d7c56a-94cf-4baf-8d78-7eb62bf7e849/53594761687.pdf
    • https://s3.amazonaws.com/fusopoxipo/novartis_annual_report_2008.pdf
    • https://s3.amazonaws.com/sojenozap/emergency_doctor_jobs_melbourne.pdf
    • https://s3.amazonaws.com/radubozufiwo/breathe_amazon_prime_season_1.pdf
    • https://uploads.strikinglycdn.com/files/0defbedc-dd5c-4afb-ac37-158d1f5cc7f3/rinnai_heater_replacement_parts.pdf
    • https://s3.amazonaws.com/sukobogixe/5062257874.pdf
    • https://uploads.strikinglycdn.com/files/93c618b3-11d2-4006-98e7-f5e2286658da/wivomo.pdf
    • https://s3.amazonaws.com/zonivezada/financial_accounting_and_reporting_1_valix.pdf
    • https://s3.amazonaws.com/fadupazageraf/grammar_nouns_and_verbs_worksheets.pdf
    • https://s3.amazonaws.com/lodazojamuva/how_to_get_your_body_to_recover_faster.pdf
    • http://puwurivetib.epizy.com/fashion_design_books_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e900.bin
2ea4e0dcdc2c45398c78178b9b59f6a5d6f9125163a54af7a8e5e179297c63d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 4924 bytes
font_01_sfnt_off0000f9b2.bin
39f386ecd207aef5309ce2343db9bddfa31b2a1a609b860ad403857940403571		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 11336 bytes
font_02_sfnt_off00011ee5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE5 4324 bytes

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