Malicious PDF — malware analysis report

Static analysis result for SHA-256 732f5a8b5c4eada5…

MALICIOUS

PDF

77.6 KB Created: 2021-04-16 07:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 13ae9ea5a05004b242a21bf5b9092e52 SHA-1: 5b317962742a85b7dc48b3816d8876282ac2cc4a SHA-256: 732f5a8b5c4eada5ec3317f5daad97cf703c674ef3a3ae1f092a86b679aaff56
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 0.9997

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 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://leonvi.ru/strik?utm_term=the+secret+dare+to+dream+parent+review PDF link annotation
    • http://fiwadewemizoti.iblogger.org/tipos_de_prolapso_de_cordon_umbilical.pdfIn PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/192505.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/iahfThf/android_developer_interview_questions_github.pdfIn PDF document text
    • http://zoxifowivo.iblogger.org/55429160775.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/Sjijfge/flute_music_ringtones_mp3_free_download_malayalam.pdfIn PDF document text
    • https://rimozaruminipa.weebly.com/uploads/1/3/5/3/135391391/vomoxofesoj.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/mVia21n/14909824563.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/hvhhfKS/corporate_strategy_vs_business_strategy_vs_functional_strategy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ee1cbc-39b7-4d57-84ca-886ca6102e8a/zutipufiwekowegusitokob.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_fb7de36ef10c4be4843abc6b7a7550e4.pdf?index=trueIn PDF document text
    • http://tupoxejaka.epizy.com/92896417108.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_b9b5520585af455cb6e595bef0498b6b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffb38b5-b1b1-4701-a25d-dcdc663bad0e/rozizevis.pdfIn PDF document text
    • http://titotoxofeneraw.epizy.com/47736234866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae690036-c18d-42dd-b89a-ba291ce82d90/vubiwezexo.pdfIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_d7caee0203434cff994d2339a7a6f8ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0dfcc1-f0f9-4b87-9484-a7fc4795c734/savunazubelugisa.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_ec8f9df2234247fd80602f97e02b63a5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fa53a4-08a7-4bfc-b680-c4d18c370903/jedureda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b10633a-5c31-40f2-8ca6-9b613a3aa576/strontium_nitrate_and_sodium_sulfate.pdfIn PDF document text
    • http://fakuzilezozo.epizy.com/bncc_lingua_inglesa_ensino_mdio.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_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 5384 bytes
SHA-256: 42ccbd68620aabd42d5fc98690d33a4b9b3fb4bd516daecfc6a268d2f877dcb2
font_01_sfnt_off00010076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10076 11552 bytes
SHA-256: e79421a4dc18d47a11bc85ad30cca50929e52939c8e6ffd48c0b6b0538b7158c

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