Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d930dd6aa368f68…

MALICIOUS

PDF

72.4 KB Created: 2021-05-02 19:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e4a47f2e7bc2a9ab552e072ea8f8339e SHA-1: b4520c6aab03f5d94c96f8df2414d7b43f7e011c SHA-256: 9d930dd6aa368f68a975990cf9c9fd2a6327a409763224174d8bb7aef746a193
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=when+we+pray+tauren+wells+lyric+video PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464052/normal_5fe3bd654ccf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422136/normal_601c94d332fb9.pdfIn PDF document text
    • http://fabulouss.space/rejogusavanokulivilamaku5runb.pdfIn PDF document text
    • http://znakomstva69.space/creatinina_bioquimicaiuand.pdfIn PDF document text
    • http://tehnopolis.org/5908637930s6vd9.pdfIn PDF document text
    • http://nubolutlion.xyz/semixabodokonijaxavivafqr7y9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_602d2bb100dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475379/normal_60272ba87f567.pdfIn PDF document text
    • http://zijojot.22web.org/meaning_of_education_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_603e8c5279825.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuvemodu.rf.gd/adverb_of_manner_time_and_place_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0145d2b6-1da5-40a5-9593-69c7e0cca7bc/24727573828.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/los_arboles_de_flores_blancas_leyenda_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec704b67-37cf-4e6e-9437-a0297082281c/wings_of_fire_wiki_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c977e466-f407-4e5c-9624-f3b1119f0d51/how_to_use_inkscape_with_cricut_expression.pdfIn PDF document text
    • http://giwofigu.epizy.com/1._3_exercises_algebra_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52226e10-eb13-4a6b-bd13-9631eeaa17e3/shining_blade_psp_iso_english_patch_download.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_off0000dc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5C 5428 bytes
SHA-256: 7ca6fe35cb87955b04ef2543f1112695d984eb546925506448f08b6af3bafbfe
font_01_sfnt_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 10964 bytes
SHA-256: e96455507f8ced9d4447a07b82ddf5e86c2c8ed93cd37502a90620339e1cdaeb

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