Malicious PDF — malware analysis report

Static analysis result for SHA-256 a488f48b01124e05…

MALICIOUS

PDF

68.9 KB Created: 2020-11-28 01:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ca1f288e1df22a01919217eef205b87c SHA-1: 5afc27fc8717f91277544fbd82a20a73cf3315fd SHA-256: a488f48b01124e05ad7dcf6e54f62439f5609166264f18603db30511c00630bb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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/strik?utm_term=water+for+elephants+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_5f96d7bc8586c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446638/normal_5fa34556ba925.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
    • https://s3.amazonaws.com/suxuzubojut/55779250496.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/73502016104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57cdb446-4efd-4f0b-a33a-22f6a28d7edb/moroluvuzik.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/iphone_6_software_update.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/smartsheet_api_access.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/sinivijomifemonefebuz.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/dna_chromosomes_genes_and_traits_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/26494097382.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_off0000c687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC687 4880 bytes
SHA-256: d73c4d75baaa24701418686462e94aae2a7b738409b2465687bfe1f8ae77a5b0
font_01_sfnt_off0000d71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71F 10040 bytes
SHA-256: f3985c9bd5dc0e43b6b29d864faeabcfe4e17708f967f33fbc21f13f4cae8b05
font_02_sfnt_off0000f93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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