Malicious PDF — malware analysis report

Static analysis result for SHA-256 72cc3113e19c1a54…

MALICIOUS

PDF

78.6 KB Created: 2020-11-30 11:10:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1c9c4c78aa6370611a3f6617d8b4bd87 SHA-1: d8464713ceaa07f7e1198a1b77ecd5c2e5438541 SHA-256: 72cc3113e19c1a543606a7349798e4c32024b48dc3d305b3579226c609302d45
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate the PDF is designed as a link farm, likely to direct users to phishing sites or download further malware. No scripts were extracted, but the presence of numerous external links suggests a malicious intent to redirect users.

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
  • 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/123?utm_term=movies+like+the+kissing+booth+2+on+netflix In PDF document text
    • https://ronifevux.weebly.com/uploads/1/3/4/7/134737402/4625508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f9204a3a1c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_5fa04acd797fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457586/normal_5fb4d7648f0e7.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/gugexijolujinaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_5fa2e03275775.pdfIn PDF document text
    • https://varavedonenen.weebly.com/uploads/1/3/4/3/134316352/kasiwevivid_wufedanidawi_kopaka_viwikug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489255/normal_5fadbaefef469.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/sowewazulejewi/jacquie_lawson_cards_member_login_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed13fb58-2cb8-4f33-9b81-f3ed40e9745c/scalar_multiplication_matrices_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/76734788768.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_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 5192 bytes
SHA-256: 5dfefc1d86411d0a5c12279380c564540abbcc35e8fc6054abd4fdc980a17a0a
font_01_sfnt_off000109b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 10464 bytes
SHA-256: 58d24787d89024cdc4b81c0cdc2f46736551be257c856ea3fb529a323b7e528d

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