Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3066486f6ffcaf1…

MALICIOUS

PDF

69.8 KB Created: 2021-04-07 22:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c0797af588f4acff874766ff171d7205 SHA-1: 5d6adbb237d951ca5f6e0c9f334903ea0d44b73c SHA-256: e3066486f6ffcaf1a76cd8b09ebf727e06efc3a115b58540b94fba6bda38c5f6
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 0.9996

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://jottigo.ru/wix?keyword=hayes+school+publishing+worksheets+answers PDF link annotation
    • http://lalomul.iblogger.org/60458095028.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5fcc0abdb4832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426543/normal_603bd3ef827b5.pdfIn PDF document text
    • http://viwoxavufonodu.22web.org/onn_cd_player_with_fm_radio_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475987/normal_5ffe53bc1a1d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393502/normal_5fedbc7632ad4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366341/normal_5fc844b6257e6.pdfIn PDF document text
    • http://zuvewedapajazo.iblogger.org/heavy_equipment_rental_contract_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5fe7c1631103f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487662/normal_5fdce0c5cdc47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_605f7b45e64c6.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/fokapikow/excel_weekly_planner_template_2019.pdfIn PDF document text
    • https://320f262d-053d-461a-9009-498fa3b044f5.filesusr.com/ugd/8e680a_8ade609ba07e40f3b1437f37b0f090ce.pdf?index=trueIn PDF document text
    • http://nejotuwusa.rf.gd/fallout_shelter_achievement_guide_steam.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/jikagozonupop.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/jebazapu.pdfIn PDF document text
    • http://ximawefab.epizy.com/calendrier_aout_2019__imprimer.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/sonegemi.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/java_properties_file_number_format.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/stats_modeling_the_world_ap_edition_chapter_4_answers.pdfIn PDF document text
    • https://f39f7cea-6337-46de-af4f-699959e6db0a.filesusr.com/ugd/004672_6c77140dab094d2b997a6df3d1279a1d.pdf?index=trueIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_c7077996ef984490935acc4bf87336a1.pdf?index=trueIn 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_off0000d1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AB 5556 bytes
SHA-256: 1b6c8f3c0c42ad091e0fdd2131ea8fce25ed91836648a6e7e43d614068e9aaef
font_01_sfnt_off0000e49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49D 11084 bytes
SHA-256: d1a47de726bcdac8fc4e95f5687fef06eda134aa87475387efc8573987f126f5

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