Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00d749f653b322f…

MALICIOUS

PDF

72.9 KB Created: 2020-11-11 02:33:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 27735d2fdc28da581b460bf13e486f2b SHA-1: b2e850bf91fd910db1e810a08e300ca7fb6bad97 SHA-256: c00d749f653b322f85d61fd1f89b63a46e73095890361366f25835e714bf9946
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting the primary purpose is to direct users to harmful sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://ggtraff.ru/123?keyword=is+puerto+rico+in+the+philippines In PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/4b03a3.pdfIn PDF document text
    • https://vogemafebin.weebly.com/uploads/1/3/4/2/134235603/wuwojenegenemu.pdfIn PDF document text
    • https://bofunakepubosux.weebly.com/uploads/1/3/4/3/134371141/1ed3a1caad4db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f8914196cf87.pdfIn PDF document text
    • https://bitebizato.weebly.com/uploads/1/3/4/5/134583528/gemig_tiduroxi_jakupit_tusoxonemazojuj.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.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://uploads.strikinglycdn.com/files/cb41f6da-537f-4609-bb49-6db6ae5b316f/godupufifu.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/tugutatirasoxatawotovon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd9a7da-da25-4a72-9e5e-8ec9acdeab72/secrets_of_question_based_selling_fr.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/uplift_summit_international_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/kim_mosley_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/58208733775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d51a297-12d9-4dfe-946c-949ea3d5068b/barbie_in_a_christmas_carol_full_movie.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_off0000d3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EA 4628 bytes
SHA-256: 0c5cc25684740a853985d4a52cdc08e07e98a6fa0d4ff8f0a7c1d47bfd1c8dfc
font_01_sfnt_off0000e399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE399 10784 bytes
SHA-256: 931a13ed3f4cf580632dc389d8c83f08f5ba8df5a71389ee0d5caad955eb1ee0
font_02_sfnt_off0001083c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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