Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d43a1de1ea7684d…

MALICIOUS

PDF

80.9 KB Created: 2021-05-10 08:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e5aa680f5bf83941208792036e55009b SHA-1: d27b23f1b95f34da149f017a67f89f05244833fc SHA-256: 5d43a1de1ea7684d229e4c88b02cf440a6375e0018f7766e59895c30b5af6f74
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous external URLs points towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://jumiwimov.ru/strik?utm_term=bowflex+xtl+size PDF link annotation
    • https://lifunakejeka.weebly.com/uploads/1/3/4/3/134358873/zegovud.pdfIn PDF document text
    • https://rawesare.weebly.com/uploads/1/3/3/9/133997405/redipufefik_kogaponozuxekuw_komawamatitudu_gunovososadewa.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/election_commission_pakistan_results_2020.pdfIn PDF document text
    • https://ruworelolovifuf.weebly.com/uploads/1/3/4/4/134462917/63040.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/princeton_review_practice_test.pdfIn PDF document text
    • http://vumubolerik.iblogger.org/formation_excel_2020.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/80798141622.pdfIn PDF document text
    • https://fofumugu.weebly.com/uploads/1/3/4/4/134445246/fokeledi.pdfIn PDF document text
    • https://liwotagavujid.weebly.com/uploads/1/3/5/9/135961529/ec1eddbce6.pdfIn PDF document text
    • https://bivilasafufi.weebly.com/uploads/1/3/4/6/134689398/rafezukaf_birujofufuxofar_rekojixe.pdfIn PDF document text
    • http://muvariwiporiju.iblogger.org/53755545757.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/furumuduxisu-rodagu-zulid-wusewajoz.pdfIn PDF document text
    • http://xuzuwilaj.iblogger.org/automate_the_boring_stuff_with_python_download_free.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/scag_mowers_for_sale_in_alabama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gajutar.onlinewebshop.net/editable_bingo_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/telugu_latest_horror_movies_free.pdfIn PDF document text
    • http://rakikazava.rf.gd/betty_crocker_cookbook_12th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/vilimumavajiso.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/54492026405.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/groin_hernia_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/conditional_statements_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/32655120587.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/sterile_pyuria_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/642374578.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 4396 bytes
SHA-256: 17750616b21b0c56478c3c46a3931586efb8e1e7b10da92ba670e30d92209137
font_01_sfnt_off000101ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EC 10736 bytes
SHA-256: 16525286481bd826887bed64b68e219ba5142d985e81c816083464c415a132b0
font_02_sfnt_off0001265a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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