Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03031a397592139…

MALICIOUS

PDF

78.3 KB Created: 2020-12-02 14:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8615a53bf8e8e9f7bc1394fdf312f0f3 SHA-1: 2036eb7e21e540e4ecba9cc95fd913a87030110b SHA-256: c03031a397592139b0209ef73b5e410866a03c322e1dda259743a9fa2ff99020
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://trafftec.ru/aws?utm_term=gldax+fact+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5fc164ddd0f0e.pdfIn PDF document text
    • https://wifusewaxoxuxi.weebly.com/uploads/1/3/4/4/134497844/a68f464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_5fb82d3f1bc07.pdfIn PDF document text
    • https://bizavurodetilu.weebly.com/uploads/1/3/4/3/134391156/kenisiv-maxoni-makisal-tazaj.pdfIn PDF document text
    • https://bivixogerixud.weebly.com/uploads/1/3/4/4/134469213/4293894.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/8a9ec887-bd6c-4630-b3a5-2323e221fd63/30807688123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068a14ad-bf5c-4a4c-b398-02d2bce9ba3b/tikebaled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93378739-c9ae-41ab-9b54-fb4ca746fd45/download_joox_for_laptop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e727ea4a794d5645064f/t/5fc1d4984f98375720231edd/1606538392992/madisebobuvubukiv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8872cf09257bd6c6ae2/t/5fc301829ee0f32b87b6a471/1606615426697/67739307134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2871c2d-e8d9-4948-978a-5bc36b5cf14d/32254856947.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36eb77848ba205d28ae0c/t/5fc479207acac6192a5061ea/1606711587361/vosusigezifemubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f4c4e2-01f8-4625-be05-bccadbafebc2/24866886299.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b6e145a8629dca737e2/1606372207281/mathematical_olympiad_treasures.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc529a5bd14ff0dd2b8563d/t/5fc74b6609f4d56e8f82a485/1606896486964/itty_bitty_piggy_lyrics_clean.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF602 5112 bytes
SHA-256: e4f9c9b7bccaeeb50478d788ac205a1c3a930e81b60c4f9338a7159fef167ce2
font_01_sfnt_off00010771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 11220 bytes
SHA-256: d61b3c05fab31a1dc740dc4db31d5b5ac2133804d9646657c4f8cb82838de300

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