Malicious PDF — malware analysis report

Static analysis result for SHA-256 9967dd14924c2baa…

MALICIOUS

PDF

72.5 KB Created: 2020-12-17 20:30:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1f83de2a687448d76aedb26e5bbeb91b SHA-1: c3014630d4541b0e623c6ef80a3bd1faa25f1e22 SHA-256: 9967dd14924c2baaba3f591ec60e1b4a6c3b4c0993426de983a6ce0e3400c6e3
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 0.9998

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
  • 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://traffset.ru/strik?utm_term=on+fairy+tales+tolkien+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f8bd1b1c26ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485702/normal_5fda7493465b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499309/normal_5fd729b4465c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fbc45cd0c5b1.pdfIn PDF document text
    • https://bipalokepug.weebly.com/uploads/1/3/4/4/134492575/vojebewituvemomase.pdfIn PDF document text
    • https://pogipusuzifu.weebly.com/uploads/1/3/4/8/134869227/jopudefi-todiva-domoxebefaje-badutikak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5fb5d6eac8556.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/40aeffe6-34f7-4f2e-ab6b-7cae10155f3c/26375790642.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57e136609fd0ee7b098e0/t/5fc7191a6beae454315ed405/1606883610545/pafojinumogedopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9427ff-eb9b-4114-a5d5-7abcf68653ae/34744183691.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11c6aec917750a3d920aa/t/5fc42f6e4f9837572063e7af/1606692719556/63505321817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485cb5ff-636f-49c8-ae02-b2b408ab0a12/9154466052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8bcc55d-9138-4afb-aad2-951f063376d4/83061348701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa5b2160-80e9-476c-8970-a4ee9233e2cc/korefawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8353147-3372-43b0-a7d3-bb8972e9bce9/fapixowuludasutaweduretuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4988f5-e8dc-4cee-be8f-3d883d9ad06e/52333059370.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_off0000d128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD128 5016 bytes
SHA-256: 9eda2b9c7e80f9b96c1506dfa70d4fed3f53487af3550f8f5a20ed5b06fa4038
font_01_sfnt_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 10940 bytes
SHA-256: 5de15d0173b41b605ecd58775217c6f23088832df0bcd8838c83f139416a4226
font_02_sfnt_off000106d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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