Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e8ca2ecb478a1e…

MALICIOUS

PDF

77.8 KB Created: 2021-04-04 23:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 58190bc95f72b5f1f8bae806a255b385 SHA-1: d4f20b4e5a7ce7b5ffbbf0dba530b96774af890a SHA-256: d8e8ca2ecb478a1ef539c919c17744e1c2f086b32af92c726888babcfb5e1c2a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/wix?keyword=prince+live+in+atlanta PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427501/normal_6056ce59bf68f.pdfIn PDF document text
    • http://dapujabowigu.sportsontheweb.net/basic_concepts_and_first_law_of_thermodynamics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_6012524b4c2de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_603bff8b63b29.pdfIn PDF document text
    • http://swiss-family.space/666456717685x50j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465249/normal_5fe03bfc0d27e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_6024c68e55751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_602b24e76e28e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5fdc172fbe8b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_605033b21bc17.pdfIn PDF document text
    • http://instapriz.online/pasuftxzxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497369/normal_5fd9c8c1760ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_605aeaef80364.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365619/normal_60078c53aac3c.pdfIn PDF document text
    • http://misstourist.info/9396047998pk6oi.pdfIn PDF document text
    • http://dhl-order.info/6847531294h7nmv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501037/normal_60407767ed411.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/70dba2e6-9b32-4619-9385-5bf350428fa0/7041189980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d846c6-b17a-4f94-8eaa-ffe9e04e6ffa/46229796267.pdfIn PDF document text
    • http://bakakixutuv.myartsonline.com/xilugakegojuturilakumowi.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/reading_comprehension_worksheets_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b297eab0-656c-4bf1-acdf-0276495450f7/16415447501.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_off0000f2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 4676 bytes
SHA-256: c38195327f7d90e5292000320afe32ceb6eee4f16f0a2bc8a0494468c5e55049
font_01_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 11384 bytes
SHA-256: 3486e89904e5f105ffd38fc834bd678a73a48fed1d33c19ae935b4b41ff3ff46

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