Malicious PDF — malware analysis report

Static analysis result for SHA-256 45aab111f9385e07…

MALICIOUS

PDF

99.9 KB Created: 2021-04-09 19:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d43b7dcc093bdfce72b7cc9b8e27e6ab SHA-1: 86bee2d16c5217f2ff2351506eaefa468b873909 SHA-256: 45aab111f9385e074ba4dbb5ed53438d0535df186b25fdc4ff0934f344dc0f81
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 0.9992

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://baarspo.ru/strik?utm_term=how+to+repair+crt+tv+no+display PDF link annotation
    • http://top-shop-store.website/vamesapoz37qa.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/suspected_stroke_algorithm_2020.pdfIn PDF document text
    • http://zebrait.fun/fundamentos_de_la_redaccionx5b0r.pdfIn PDF document text
    • http://lajulufubugo.22web.org/47821644634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484154/normal_5fe85cf09db15.pdfIn PDF document text
    • http://leafester.online/26194700034fqlu0.pdfIn PDF document text
    • http://lodulumadumaka.22web.org/postpartum_hemorrhage_rcog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_602ad1db038d7.pdfIn PDF document text
    • http://ecoterritory.store/9861118817njmj3.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/schaum_s_3000_solved_problems_in_calculus_download.pdfIn PDF document text
    • http://warewakeb.sportsontheweb.net/statistical_analysis_m._com_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_5fe859c6c7bba.pdfIn PDF document text
    • http://fozobojik.iblogger.org/difijusoneri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_60610265433b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443802/normal_5fe12899a64d7.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/gixawetopoli/31078111642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfe7d46-24ba-4e20-a695-b1eca0fb58d4/70772876736.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/najukunibewasoduvol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e8b043-6b8d-4f54-8e8f-50339fefaec3/91808409285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b187b51-f487-414d-aa18-165da3688f41/noxerimaluma.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/pataxuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ceedef-719d-430f-a844-9f9a3df07eea/motorola_dcx3400-m_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/tisitosimipafukogasikopo.pdfIn PDF document text
    • http://nokigabexotuk.rf.gd/avery_mailing_label_template_5366.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/sports_illustrated_swimsuit_2017_models_photos.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_off00014727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14727 5284 bytes
SHA-256: 72ffa8704abb5af84088e5aca3479f27ba7e936f065ee7d62ac3528115726c88
font_01_sfnt_off00015944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15944 11388 bytes
SHA-256: 75f5caf91fd8f0a97e2bc94d396f225ec154de9b7486599c9ab3ee4966d39289

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