Malicious PDF — malware analysis report

Static analysis result for SHA-256 114fa91441f5955a…

MALICIOUS

PDF

79.9 KB Created: 2021-03-24 00:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 74bf5c077b8dedcefe7c91ae7625a1c1 SHA-1: 50bc1aea1eda374175aa56e5d7e988b39100ddb4 SHA-256: 114fa91441f5955aa6553de25023d8bcbe752239134c07bffec9f1fdf91c3fcf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=monsters+inc+boo+doll+amazon PDF link annotation
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/3127325.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/les_miserables_1958_movie_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/if0Ejd0/furniture_mod_minecraft_pocket_edition_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/raigLii/26766582153.pdfIn PDF document text
    • https://xopilujipuwoka.weebly.com/uploads/1/3/4/8/134886601/dodotabuv-kizejed.pdfIn PDF document text
    • http://pekibexuvipeve.scienceontheweb.net/30329015413.pdfIn PDF document text
    • http://retelikilerodad.iblogger.org/rutugepobuduvunero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_071cba5e9bcb4a88b6927dada33892d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9936fce9-21b1-48ee-9c2e-08e4495b32c3/pufokerumij.pdfIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_b4ee6e1980464fcc8849b8d4301ed652.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/962ef445-6890-45c2-a4a0-83284c75d771/how_many_catalytic_converters_are_in_a_2005_nissan_frontier.pdfIn PDF document text
    • http://pimubejat.epizy.com/addictive_drums_vst.pdfIn PDF document text
    • https://97e6e6c8-040d-427c-ad66-6ef02350ae38.filesusr.com/ugd/9c523c_69f5778c25334c18b2a3845185d4ce33.pdf?index=trueIn PDF document text
    • http://tokivatifizaxe.rf.gd/prevencion_de_caries_en_nios.pdfIn PDF document text
    • http://guziruxasa.epizy.com/vinedenes.pdfIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_915d62b0d0104787b8a088773848a437.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B6 5280 bytes
SHA-256: beffc69822213a605a91873bcb3d4bc353de9e2eb2ebaf3f1114d747d9fb2954
font_01_sfnt_off000107a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 12284 bytes
SHA-256: d2bd14fbf5a97a5d0d4872af03ac28245a749b2d47c17fb3c806a49a3760c30b

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