Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd003438545507ac…

MALICIOUS

PDF

105.3 KB Created: 2020-11-22 01:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6ec600aa61c299823e3ad6021d236072 SHA-1: d99d7e4ea0095a521b344b1f043ea45ce0364046 SHA-256: fd003438545507ac4d6733316cfce203c3b67fcd6d4f5f3f5e413553fcabe371
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=bratz+fashion+pixiez+dolls PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f9a087823a06.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/1244728.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/61139c84de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb69bd6c-115d-4b99-bb2f-4cbf78650f1b/mustafa_zcan_crmm_ile_geldim_sana_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/buroxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf85264f-712f-4d95-8205-2ef52f3d63d2/87555871656.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/tor_browser_apk_download_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce643e4f-db56-418b-b3be-fbac65e1aacd/rulokojasodowemenib.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/21024000066.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/feeding_guide_for_6_month_old_labrador.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ff7acc-c52c-472f-ada6-bb7e8130fa53/kuwili.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/50056792802.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/bizinenawamefu.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_off00015b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B9F 5296 bytes
SHA-256: d27217c902244b89a074c932b4a6efcc3a097af8dc208a69768ef33ee2e4466a
font_01_sfnt_off00016db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DB0 12520 bytes
SHA-256: bac3a857e92a9a2ec1bfe48c9cd883c10350083f8e0be0d0c3afe970eb911438

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