Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a419a5f332328d1…

MALICIOUS

PDF

59.8 KB Created: 2020-11-19 08:09:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9c2413f571bdb7313c6ebdfe33289b73 SHA-1: bbb078aa32e675d3cc121377fa8f0c66ef0073fb SHA-256: 7a419a5f332328d192ba8b75e177b85f8fa273d3efe4c48b7e82232c5c8dcf39
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ClamAV detection. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely used to lure users to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=blank+map+of+13+colonies+to+label In PDF document text
    • https://cdn-cms.f-static.net/uploads/4461201/normal_5faab02b6b45f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f9b1f3b955bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f8fa1d8dc4e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5fa06b1da8736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_5f966d194329f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5faba32a1b5e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f9bd32540037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5fb433670b1db.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/e7ef4913-07b1-47e2-a628-280ee6b864dc/jjrc_h31_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/38839611911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7cd3e9-bddd-4881-abd3-c7c5707f2b98/mawajepew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc3b1af-3603-4a5b-8dab-35b500e7e525/escort_backpage_new_jersey.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/xuzeg.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_off0000ad69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD69 5532 bytes
SHA-256: 5f7cfbb7dd3284a2d8dd94de9cc7afed6c5fa8efc0262b50066c2eee0f876e76
font_01_sfnt_off0000c036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC036 10144 bytes
SHA-256: 9ea79fec8d1d0d2d1e1cf6b51ae5700cd52b36b01c0a793ede2a3243db64b8eb

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