Malicious PDF — malware analysis report

Static analysis result for SHA-256 81deba2601b16a3a…

MALICIOUS

PDF

73.4 KB Created: 2021-05-06 04:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f85a8841a7c2c25aa77db66665c2f88f SHA-1: 588dd47c2731fd582d8e506af1b7e1de076dddcb SHA-256: 81deba2601b16a3a18651582b1556ef305485a4285b93c72b996165d84cd78c0
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://resalured.ru/strik?utm_term=how+to+collect+like+terms+with+exponents PDF link annotation
    • http://wojurimaxab.mywebcommunity.org/ninurajowuziditarunimet.pdfIn PDF document text
    • https://noberewesuxo.weebly.com/uploads/1/3/1/3/131379636/kisedi_sotupatonubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_6022d74dc445e.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/enciclica_caritas_in_veritate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_6047b2dee6be8.pdfIn PDF document text
    • https://karujelibofab.weebly.com/uploads/1/3/1/4/131406149/wobabukogisugag_bonekaxoweketo.pdfIn PDF document text
    • https://likudone.weebly.com/uploads/1/3/4/6/134681098/jaxajisunudexal-newelibulegew-tumozanujoka-mozelemunojoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gefegeku.epizy.com/cupid_and_psyche_apuleius.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/13174530461.pdfIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/high_flight_poem_annotated.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57f10938-f22e-4ffb-a1a5-a776c418bdfc/fusivodiluvos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2bd3007-653d-4c85-98e6-38c8f6b68d5f/can_you_drive_at_14_in_arkansas.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/68142868118.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/edhesive_quiz_2_answers.pdfIn PDF document text
    • http://jogebupirenewid.rf.gd/sibobikikijuvijinuv.pdfIn PDF document text
    • http://vufefedutuja.epizy.com/colostomy_nursing_care.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8516ec-041f-4eb9-b95c-80b3b582900f/figonozuwawavuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70557da-59f2-4aef-8b4e-f443902924a9/68269943457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db25b8c-f5b7-424e-99dd-25a095aa5f61/25243206834.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

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_off0000e191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE191 5148 bytes
SHA-256: c931153ef9d5e1f5ca7e86efb62440e761d5357e49ca4af1aed073928ffe6e6b
font_01_sfnt_off0000f300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF300 10544 bytes
SHA-256: 7cde6dfe995a9802bc023654aa830e781a372e35435f50857a58bc934c789608

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