Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa5658624539390…

MALICIOUS

PDF

74.0 KB Created: 2021-03-11 15:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d000f8dec94e3d04877a3e643bd07b1f SHA-1: ebedace60732bc8f25c710c500e2b964a02070b2 SHA-256: 4aa56586245393908cbb06f8c310617192cec97a1592750b7d77a9af96bbac20
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest it contains a large number of external links, likely for SEO manipulation or to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'butcher and singer menu pdf' and 'wkhtmltopdf', suggesting a lure to disguise malicious content. No scripts were extracted from this sample, but the numerous external URLs are the primary indicators of malicious activity.

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 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://resalured.ru/123?utm_term=butcher+and+singer+menu+pdf PDF link annotation
    • http://generatorsale.ru/los_juegos_del_hambre_en_llamas_completa_en_espaol_gratis9f7hy.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/hiQJSjb/diversion_definition_psychology.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelemusib/hbji582/michigan_abortion_consent_form.pdfIn PDF document text
    • http://umniashka.ru/ap_literary_terms_practice_testubuqa.pdfIn PDF document text
    • http://tiktokhd.design/jogunetivebelsot5x.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/jgichhj/juwiterebemadosakewiba.pdfIn PDF document text
    • http://repair-planshetov.ru/ge_telephones_with_caller_id3htwg.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/blvieHc/33397047182.pdfIn PDF document text
    • http://azakalaza3.xyz/97236351384qte1a.pdfIn PDF document text
    • http://startask.ru/what_is_the_constitution_of_1871wekv8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/lepozikimimave.pdfIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_ff8248267ee24712bb6a8329cf4a5b5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/ranabiliwezebebal.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_6e4aa4a67c3c4f3ab3aa50eddef846d8.pdf?index=trueIn PDF document text
    • https://b40f07b9-a98f-42b6-a6e2-5dc2c82ebb0e.filesusr.com/ugd/e949ea_3573a6659b954075950c8c9101c3880c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/23117669523.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/note_3_battery_original_price.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/ayuntamiento_de_madrid_telefono_informacion.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/express_vpn_android_4._4._2.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/junelogabete.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/why_is_text_complexity_important.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_6ed3654478cc4daf9310d6d02a6130ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/drug_calculations_examples_questions.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_fc834c27311f40189af14c526a4a65d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/67227479990.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_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 5588 bytes
SHA-256: 956405381feeb21e36c386e657ab1a9dc9e116a655a06acd8a1f66663fd1e2c8
font_01_sfnt_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 11816 bytes
SHA-256: f595542009dcfe8783a99fb021e5ebb5666d1bad2c5dc4e04abbf92f22e8e3aa

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