Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf561de7b3feeca…

MALICIOUS

PDF

72.3 KB Created: 2021-01-10 18:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 824542a22797bd6fc83e94e6bb7c3bba SHA-1: e463ec36ca55c86b5e486ca0a7b90832135ac8ef SHA-256: caf561de7b3feeca52c22e614e903b76f7374c258498814e4242cad4f178fd2c
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, suggesting a link farm or phishing attempt. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=birle%25C5%259Fik+fiiller+konu+anlat%25C4%25B1m%25C4%25B1+pdf In PDF document text
    • https://menufepu.weebly.com/uploads/1/3/1/1/131163725/14512be4b.pdfIn PDF document text
    • https://site-1174788.mozfiles.com/files/1174788/novoxafijudebedujatuvi.pdfIn PDF document text
    • https://warasogufav.weebly.com/uploads/1/3/4/4/134440103/4559299.pdfIn PDF document text
    • https://site-1177444.mozfiles.com/files/1177444/piggy_and_granny_vs_siren_head_horror_games.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/45d128dc591a0.pdfIn PDF document text
    • https://xaluromaw.weebly.com/uploads/1/3/4/8/134862284/3367092.pdfIn PDF document text
    • https://mirixenapokep.weebly.com/uploads/1/3/4/8/134853357/448dc6ab7060.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/remuv/resonance_sheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/apptec360_android_for_work.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/piduwadelipadup.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/change_management_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/proc_freq_sas_class.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/bigubuke.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/21654389936.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/rogifexarolo.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/civilization_alpha_centauri.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/harlow_to_peterborough_traffic_report.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_off0000d928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 5404 bytes
SHA-256: b54d415c28de4c6b5c807a70343018ac3a352f42c86006b35f2f2a9fa22d3bcb
font_01_sfnt_off0000eb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB75 12116 bytes
SHA-256: 9583a9f3910523efc8643ab5ddf3b1c22492911f82d02eae58376c6a65344904

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