Malicious PDF — malware analysis report

Static analysis result for SHA-256 389f4c2a1f9e7155…

MALICIOUS

PDF

57.4 KB Created: 2020-11-13 23:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d4b5fb4e8a9a7511dd6d376d90525d80 SHA-1: 07df217f3376156e6b722ec782b0e3662514d015 SHA-256: 389f4c2a1f9e7155f4eb39cae7e4e0e8c0df2bd0c8f800d39d8bd5c0deee3e4a
212 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection to malicious sites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. The ML classifier and ClamAV detection further support the malicious nature of this document, indicating it's likely used to distribute malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8432

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?utm_term=cancionero+del+camino+neocatecumenal+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383302/normal_5f952919741b3.pdfIn PDF document text
    • https://tekuximusiwax.weebly.com/uploads/1/3/4/4/134450812/sivixowigos_tejebive_latazugodusi.pdfIn PDF document text
    • https://zurozudosumo.weebly.com/uploads/1/3/4/7/134719863/812c39e7ad.pdfIn PDF document text
    • https://regujume.weebly.com/uploads/1/3/4/3/134339948/7741f75d5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_5f9381d3cf04c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f9585b809880.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/3755593.pdfIn PDF document text
    • https://sobokiza.weebly.com/uploads/1/3/4/3/134363786/2523476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381531/normal_5f9a928f6d18c.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/pazerogasarinu/uc_daap_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ebcb47-8cea-43d4-8c2e-285ab0d53080/fojusivopanabipexipesogo.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/context_clues_worksheets_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/tosujabuza.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/jetblue_airlines_reservations_flights_status.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/16372411196.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/tegukiwuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/tosivepenasaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/372589bb-0aa3-4eb9-b013-38a8ddbb0c8a/7661496155.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA34 5028 bytes
SHA-256: 3c11ac4f7f611aa41a7ddcef5d00aa64a2eeeb9b451ec3a5029de4b02bd81eba

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