Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb824041d3e7acf7…

MALICIOUS

PDF

79.5 KB Created: 2020-12-21 12:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1e1d69c825ae5f84160e4519e49ff04e SHA-1: 175c6e83a1a80613cda5aa6013dcf950593bc3ad SHA-256: fb824041d3e7acf731c2c7c46e09f2d561fe33ffda272987474812ed9b3ac70c
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 0.9994

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=crafting+blocks+world+pocket+edition PDF link annotation
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/dopug.pdfIn PDF document text
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/remom-ganuwi-bobunipit-gitakalo.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/3715939.pdfIn PDF document text
    • https://dewisepiremutu.weebly.com/uploads/1/3/4/3/134318599/gijilabipobube.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/a7d5f2ba-19c3-4421-b7b3-699fcd0e2bc0/87919873428.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13a23affbf90a66eca3c4/t/5fc972eee31f6d5f0949c663/1607037684382/black_country_music_singers_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79b14a4492a057e2477e3/t/5fd713bbd654060362e00e4e/1607930812876/zonuvawizijife.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/define_nucleus_pulposus.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/kiruzegikamu.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/communication_skills_for_couples_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/zutoniruferipukol.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/1854485992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7abc3e-6217-4da7-9e34-71fe74ea44f8/47233727321.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB06 5432 bytes
SHA-256: 59b3bfc100e2b34c963cb41f53ac112a1d704bf70f7280488b059b0ea9f4c37d
font_01_sfnt_off0000dd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8F 1896 bytes
SHA-256: 10fc098a633bfdb69d647512ba2be01cfb795f7e13dacdc7bf0acfee844e1484
font_02_sfnt_off0000e6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BD 10976 bytes
SHA-256: 0220d3ec7ba87a3e858ef72703a1e6bf6a54137c74d489da04c5b94f854a20f5
font_03_sfnt_off00010c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C12 16428 bytes
SHA-256: 9392ebc7ab061d566b3642f1175c9567bf3a919921e22672108f61b78bfa138a
font_04_sfnt_off000121ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EF 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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