Malicious PDF — malware analysis report

Static analysis result for SHA-256 30484d69c5bfbede…

MALICIOUS

PDF

70.4 KB Created: 2020-12-30 08:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 62c0e37ff3a74b4f6f23522a12d98a73 SHA-1: 968b42c2cddd3e1746a198a8af3b0ea1aba7417a SHA-256: 30484d69c5bfbedee6e0bcb9fa88c10b13e4ac7228c746293e2f5018c8c65c4b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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
  • 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.
  • 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://trafffe.ru/123?utm_term=qubo+night+owl+wikipedia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421462/normal_5fd67103ec0b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5fe2b2e44c409.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/xorawozijed-wekuridiruxerom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8f91d328eb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369518/normal_5f88c86606d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_5fe61c8a4b91d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457305/normal_5fdf777d60367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5fd105d09dc77.pdfIn PDF document text
    • https://lupenasax.weebly.com/uploads/1/3/4/7/134738003/c5b644.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/tanikanaw/biology_book_class_10_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe0ecab-13ad-4394-b852-358f3b500839/calvin_klein_beauty_perfume_1.7_oz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e334c5f3-4b86-4fc9-9e19-a895e2a94527/14310176226.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_off0000d7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E4 5304 bytes
SHA-256: 6ca0d56566a1f227cde6c4bb0fa620307935c9bd371866a8f28fc3bd551622a0
font_01_sfnt_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 10268 bytes
SHA-256: 6c6bd4029c3ec91a3ed4364894b2bff0e8fb9f843be0f0271bb49a01b73f23df

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