Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8932ed62e8b40d…

MALICIOUS

PDF

72.3 KB Created: 2020-12-27 09:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3095898a6cb798da027a1e5b66933f95 SHA-1: 73a03df215819f54f480d758f9cfbdfcf8376cd3 SHA-256: bb8932ed62e8b40d336ddd069cfec0c66f2b6af92fa048a876d052bdefe2278c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded links, including one pointing to known malicious redirector infrastructure. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/123?utm_term=channel+master+cm+2020+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_5fa03c3cae5df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5fe5ba43ed993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f97dad876070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5fbc9042ce1d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5faa4468a74d8.pdfIn PDF document text
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/82f944282b6.pdfIn PDF document text
    • https://wemovimezatura.weebly.com/uploads/1/3/4/6/134611727/1091554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5fb8d0a30652a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f9e4d6d85290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_5fbcb8e39d0e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5fad858932cd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5fa5db68aa2ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461766/normal_5fa6bd60da777.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/farefasejikap/tazedo.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/63006237287.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/bebo_honey_singh_song_free.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_off0000dab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB2 5372 bytes
SHA-256: 89f62a1b8f17888b07e4baf009e38d2cb64324dcf897e7fe444b3edac4340d61
font_01_sfnt_off0000ecd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 11088 bytes
SHA-256: f2a0d6f389cf72165bd96b5e5b373b3aae2f64218a59e837770aa529c1d5564b

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