Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6233587c3780cd…

MALICIOUS

PDF

65.4 KB Created: 2020-11-28 06:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1cd2a8767bc39da6e8b3845452acb22c SHA-1: 2dac7640ddc2b7e4fec4441bbb2a1139dd8f7f64 SHA-256: fe6233587c3780cd78b64d6e93208044cbdb10ae88c0daf57aaaccffdd780783
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-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://trafficel.ru/123?utm_term=meguiars+super+degreaser+walmart PDF link annotation
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/tivugukif_sutedud.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/3649022.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/nalegu.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/lexuve_jarivudisumuwan.pdfIn PDF document text
    • https://vilewufatavak.weebly.com/uploads/1/3/4/5/134585542/cf424f.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/jezobasit/ls1_edit_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb64de5-02e6-444f-9d42-18c6e457111c/lewis_structure_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/3_position_toggle_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/nc_math_2_released_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8d9276-6496-4b61-b747-442208bf1ebf/machine_gyrotonique__vendre.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/20907988937.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/39778632509.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/to_kill_a_mockingbird_poem_about_jem.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/78196113352.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/the_lost_symbol.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/spring_framework_reference_documentation_4.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_off0000c0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C8 5376 bytes
SHA-256: 70e863793c3d57d06e7ee2f8f69eb531f8ddc5303232d021e589d7af5fbeee60
font_01_sfnt_off0000d31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31B 10784 bytes
SHA-256: 4889450a264837f438c85c32f4d03538175efcb27aa1de336e8a160691b872cb

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