Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ef98ae95cd7d2f…

MALICIOUS

PDF

76.6 KB Created: 2021-03-19 09:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5e3a3a87078677fa8f516c66c4880f2a SHA-1: eeb47b2e08206f0458258390cbd30ae133849d39 SHA-256: 90ef98ae95cd7d2f35f4ac1040c131dcaca40111eb590d871a2973bf2f822cbf
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-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://seumenha.ru/aws?utm_term=troy+bilt+weed+eater+tb35ec PDF link annotation
    • 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://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_3ed728ab6dc3428da04dd81c41a640f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/8176483816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44655db-b130-4b08-8525-00436e5b839b/how_to_clean_filter_on_dyson_animal_dc41.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/xokudarupapagimegasoj.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/browser_based_games_no.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/what_is_difference_retribution_and_punishment.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/how_to_connect_microsoft_wireless_keyboard_2000.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/azure_application_gateway_certificate_arm_template.pdfIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_8786d75e7abe4d95920f038e4f89f001.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/titugome/military_aircraft_performance_database.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/zepadabenefan.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/freeport_offshore_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/wild_game_camera_pir_setting.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/xemuzonowigesabubemukojo.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/wamenatinaxavenenulum.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/plante_feuille_cordiforme.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/63068222057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8926fd9b-1017-47d6-9606-50cf72379cdb/5844486635.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/dajavuxevubilamefupurezo.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_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 5008 bytes
SHA-256: 27753bfa6bd3fc47740178722d7d20e2b0b855665a7a6deaca3dfedfb578ed8e
font_01_sfnt_off0000f0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E5 11196 bytes
SHA-256: f5483225e18c10eef4e926a51fd65d94ef1b61297823d4a702ff9a15794c0199
font_02_sfnt_off000116d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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