Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7543bf500e252e…

MALICIOUS

PDF

89.5 KB Created: 2020-12-10 22:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4ba0b97e73ddaca801119e167692d9dd SHA-1: 951ba927edb66a23d7086a8f6fb538ebc463edce SHA-256: 2d7543bf500e252ec3509f3f95b6fcf375ebc747523f415e64b8ed9c3fe1f8fa
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-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://traffnew.ru/123?utm_term=expressionism+vs+impressionism+music PDF link annotation
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/61edcabf6.pdfIn PDF document text
    • https://furutivox.weebly.com/uploads/1/3/4/3/134360368/zugojezo.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/3465864.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fcdf642705f6b5d2cc370b9/t/5fcf5a3d68c18617d4102203/1607424573872/undateables_uk_cast.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf4f2145a8629dc760121/1606284530850/sims_3_cc_hair_colors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc512eae-724a-4642-b9f2-fcd5809f79d9/special_right_triangles_scavenger_hu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eff460f2895dc1e80f14/t/5fc8bb21094cf7617dc7aeb6/1606990627582/munedepusezurirugezupepir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc505c01c8c7413144c6c55/t/5fc5f9b6fa04221c71ede228/1606810038836/dental_decks_part_1_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6d326e-abcd-465a-92a2-a4f620567e5d/74503213930.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a29a717a0f60c4048903/t/5fcbd8e4a0b42e3566b39865/1607194854397/wakabiduwizafagukirin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68766ea4a794d566c19da/t/5fcb24939cf56e0e8b0ceb9d/1607148692231/prison_break_season_6_fox_river.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def5a2bd-562a-4c9e-9748-9156b1ae8106/20797542461.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4da975bcb0228a29bc7b8/t/5fca4cf79bc93d20d9bba9e7/1607093496447/kitten_running_around_after_being_spayed.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 4920 bytes
SHA-256: 2740ed0a78f172ca0f16af95b9e4b3e8a235384e32b7b98f71187305f56a8036
font_01_sfnt_off00011bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAE 12084 bytes
SHA-256: 53a4d8c9d0fb7f3e1210f84ea3c93d48a51f7d44e2e496fd9140847793c8d48d
font_02_sfnt_off00014373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14373 16120 bytes
SHA-256: 73e2bae015806fcbcea00a5e77fef36cf57312733aebee32ba98308b5ce41d75

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