Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa24a5d8e90e4b1…

MALICIOUS

PDF

143.9 KB Created: 2021-04-03 02:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b23d5b9ac0c06baca7c70051065af9eb SHA-1: ef47ee978a32a3b36b047e8ee651dba45a8a048b SHA-256: daa24a5d8e90e4b177ebb434a78d02ae6248bf516a418099321da099dee0b6c4
156 Risk Score

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://kuzutuzo.ru/wix?keyword=one+room+runaway+girl+guide PDF link annotation
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/pabibulu.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/10264767874zwk0b.pdfIn PDF document text
    • https://xemexavowud.weebly.com/uploads/1/3/1/8/131857479/2f6f5a2b9c.pdfIn PDF document text
    • http://ashotik.space/el_seor_de_las_moscas_resumen_muy_cortoqt8sl.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/ocarina_of_time_switch_price0dhmq.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/ifiiihY/17493903931.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/4hbIKRs/yellowstone_national_park_history_fun_facts.pdfIn PDF document text
    • http://liketime.online/798679330017okc9.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/gAjjha8/lowetegefuviwizelug.pdfIn PDF document text
    • https://pusenosate.weebly.com/uploads/1/3/5/3/135347115/5015c286b.pdfIn PDF document text
    • https://walazufa.weebly.com/uploads/1/3/1/3/131383665/90acb0be4d.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/1752ba612fe2.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/pubopelej/rumuro.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/22020819496.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/kuvewivut.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/66274735414.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/captiveaire_exhaust_hood_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF713 85148 bytes
SHA-256: 9664d43cefa3ee2b9fd534ab4a98802f08ee9ef658f33c13fdb4c98e776f94ac
font_01_sfnt_off0001f5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F5BE 5188 bytes
SHA-256: 4a5077f2780a069dd1cfe9ca5c4a7ff85d0c395f0411c32cba97053cd88e09ba
font_02_sfnt_off0002075e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2075E 11960 bytes
SHA-256: 9d4b00efd8c00eb3bb94f9440298b580ead1ab5d0e0b415aebfed78f3349ec96

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