Malicious PDF — malware analysis report

Static analysis result for SHA-256 9098c46d66c0ef3e…

MALICIOUS

PDF

87.2 KB Created: 2020-12-26 04:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d85e4ddff76b69046cba641c12ddba51 SHA-1: 98dc2649584c1ae3601ba4888751f2d02dd05b8c SHA-256: 9098c46d66c0ef3e732d3a07ad1900bd8b0e48b3cc37f9f85a58611b8d308fd6
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 0.9995

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 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/123?utm_term=36+questions+to+fall+in+love+en+fran%25C3%25A7ais+pdf PDF link annotation
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/45757e1fc85.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/4743265.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/fizosudusozi_virirajam.pdfIn PDF document text
    • https://pakunifa.weebly.com/uploads/1/3/5/3/135307874/7979577.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/ehfaidt/17476164340.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/fcadf19d-5e6f-48f4-b06d-4a0b30270718/download_harry_potter_and_the_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898d02f5-b311-4e0d-9b64-8ac2e11c685e/vegefagakixitufozutegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9cf124-14ca-41a2-9fdd-aedba0ef429e/tovopomifulegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f290a835-93c0-4ae8-9c3d-0da18a1b2e8a/washington_state_hockey_jersey.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/zatufa.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/proform_395_e_elliptical_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/71702558753.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4E 6640 bytes
SHA-256: 676a26e893aff076f0ff608dca872b7d7f83e3fecca294a09e3624b1d4c8543a
font_01_sfnt_off0000ffe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE9 5624 bytes
SHA-256: 408d9e29526c742153716bd49315f70b3dfb692dc7d4c8c495542e675b0eac98
font_02_sfnt_off00011322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11322 10704 bytes
SHA-256: 21bef72975cc7759fa5b8024481ad2ead3c03f90e5fb5fe5942359287e17172a
font_03_sfnt_off00013737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13737 16148 bytes
SHA-256: dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06

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