Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44746277b5551d8…

MALICIOUS

PDF

99.5 KB Created: 2021-04-03 14:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d97590a6d28b1385f887b7675562fc9e SHA-1: ce2a6e03b9e3e456cf8f6d8d32190a85433a3627 SHA-256: c44746277b5551d8fe98a43924dea3be0dd35c669a374e1cf9c906f99efa2f39
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used to redirect users to malicious websites for phishing or malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users seeking specific content, leading them to potentially harmful sites like 'ponafet.ru'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/award?keyword=bultmann+theology+of+the+new+testament+pdf
    • http://static-start.top/audi_s4_avant_gebrauchtwagenhqghj.pdf
    • http://poopo.ru/88493651071k3ynx.pdf
    • http://film123watch.com/which_process_of_sedimentary_rock_formation_occurs_last_brainlyrdbjf.pdf
    • http://specialsale.info/sonajatasokitubuwl9ay6.pdf
    • http://douchehq.xyz/97437082395p4rgk.pdf
    • http://meetly.space/chemical_structure_of_oil_moleculewq2tn.pdf
    • http://bonifacy.site/xoselajugonie2c85.pdf
    • http://izzzaaa.space/tosimovijodhtb2q.pdf
    • http://wofonefa.iblogger.org/15275835606.pdf
    • http://proba7.xyz/how_to_discipline_your_child_bookrzrd2.pdf
    • http://barberking.best/masulavusi6ldnv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/semuxemakaw/tunoludetetadiruvikupoje.pdf
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_9c55280adfac467a89bc7cbce4e89ca7.pdf?index=true
    • https://s3.amazonaws.com/sosupejuxofedo/algebra_workbook_online.pdf
    • http://datuzijopo.epizy.com/gazamu.pdf
    • https://s3.amazonaws.com/zevutebulaworel/ado.net_interview_questions_for_3_years_experience.pdf
    • http://legabukev.epizy.com/gotozimibive.pdf
    • https://s3.amazonaws.com/garorowa/olympus_om-d_e-m1_mark_iii_review_dpreview.pdf
    • https://s3.amazonaws.com/fowonaxul/fagaropu.pdf
    • https://s3.amazonaws.com/zeworibuzoza/geraxajuxodudepuwa.pdf
    • http://regimewidepo.rf.gd/cavalleria_rusticana_verga_testo.pdf
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_bb95b3d46a704b9b82ea757775589bcf.pdf?index=true
    • https://s3.amazonaws.com/jivagajamav/32808532896.pdf
    • http://weralawubuzeg.epizy.com/conceptual_physics_semester_1_final_exam_study_guide_answers.pdf
    • https://s3.amazonaws.com/ropuba/ielts_score_reporting.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014123.bin
805b390940655bb6cc5f77914915cf70d3371aefbe0d0457f2ae25901984e8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14123 5600 bytes
font_01_sfnt_off00015430.bin
f55324b08fd5d88519618a32e740801e9b7e7feec92a6126a8677118f4f40c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15430 13188 bytes

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