Malicious PDF — malware analysis report

Static analysis result for SHA-256 64aa3406b494b6cc…

MALICIOUS

PDF

74.9 KB Created: 2021-04-01 05:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3d55ce8270df19b4ab1954374fa4263e SHA-1: f4f4f75e83a1eb756729b9c672348f67ff42bb4b SHA-256: 64aa3406b494b6cc1f9d0712e0063d4bf16f40114d81400b9586c77860a0aac6
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=what+is+chemosynthesis PDF link annotation
    • http://mgacessoria.online/2533794713dmv7p.pdfIn PDF document text
    • https://cdn.sqhk.co/feziwetesene/aiahgeG/4fun_tv_programy.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/jvSPDpm/18702637224.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/cinquante_nuances_de_grey_2_sur_netflixdvy01.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/kotuludoz.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/niajjhb/44525478644.pdfIn PDF document text
    • http://zawateminito.iblogger.org/63951463442.pdfIn PDF document text
    • http://sezejawi.mypressonline.com/75300655602.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/EpZcPia/timoponapomafovo.pdfIn PDF document text
    • http://moshon.space/kolotebovazodelalosamunuk4s8ru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9aef9be9-4304-4ec6-b02b-ded1eabc5d1b.filesusr.com/ugd/a571b8_275a71fc5b7248db830d0a40196ce844.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_e15a9eade4f142809cdbd68c344534cd.pdf?index=trueIn PDF document text
    • http://zokaramizixa.atwebpages.com/jupebuwejekulesaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6be581-58df-43a3-9f3f-5040062adfdc/64818082008.pdfIn PDF document text
    • http://ponodoveb.rf.gd/nodab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1f91a7-383d-47a7-b4b0-a1cc65176089/duxivuzepedawoxolepakorow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318a97dd-32e4-4785-9a91-1fdf7828b9d8/what_does_baptism_by_fire_mean_lds.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/bomoporaradesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d038103-3f93-4466-9965-39d471913cc6/how_to_use_digital_signature_epass2003.pdfIn PDF document text
    • http://sulenovigadi.myartsonline.com/62671188512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/413ba998-c90a-48ca-9579-e256a6d0b509/lawoxunaxexojor.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_6016621342af4c48bfa51a76d6ac93b5.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 5028 bytes
SHA-256: 0ba94ffa590382725a530a56722979616d7923a3322bff06637152a6745ba2a2
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 10696 bytes
SHA-256: 39a64e0799a741499f5c9465d3eff39574ab9bacac23eee982fcfd473c4b8c4a

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