Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f50a21db2ef8ed…

MALICIOUS

PDF

77.1 KB Created: 2021-03-15 02:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: bb16f698c2107176177947e5c84edc96 SHA-1: a182ecc232e0bf76e923c59d8dfa7caa6bb2a1f3 SHA-256: 01f50a21db2ef8ed449b049eaa6f5b6bf65a58f432e804a9f4c1ac8de3f5210c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://leonvi.ru/wix?keyword=fictitious+business+name+publication+san+bernardino+county PDF link annotation
    • http://tricitysikhs.com/stock_market_closed_veterans_day_2019dp7o0.pdfIn PDF document text
    • http://opssmall.space/65455580129tk4iq.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/3781076.pdfIn PDF document text
    • https://vinazova.weebly.com/uploads/1/3/2/6/132695356/vizoseniliten.pdfIn PDF document text
    • http://lighterusb24.site/dudururuzitabuvegidrmqn5.pdfIn PDF document text
    • http://woodlesenka.ru/lefituzipogirevivumoneb2i2ym.pdfIn PDF document text
    • http://spiritstudio.ru/67529536697kcoxh.pdfIn PDF document text
    • http://devgame.design/3120937643006iht.pdfIn PDF document text
    • https://megigoxifiwovom.weebly.com/uploads/1/3/0/7/130740625/b93f35b.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/5679968.pdfIn PDF document text
    • https://cdn.sqhk.co/sudofeno/igdggjb/xadujufogivu.pdfIn PDF document text
    • http://libertinemodels.com/best_kafka_short_stories_redditazo5h.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/jh90Rhh/kirefugipu.pdfIn PDF document text
    • http://neojust.ru/sonawizuwojgvwn.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/c7fd2d48-b5c9-4473-8942-f0c4c5bcfb2b/gramatica_espaola_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b12e78-a939-462f-ac11-5ab67b862244/color_a_course_in_mastering_the_art_of_mixing_colors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89feddc-2ba1-4b60-bbb6-5b1a222bfbd5/domege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fdfe90c-514a-4bc5-9697-933d6744749e/20484638659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f86af88-e2f5-4b01-9c35-0f1c1d75e223/femoxozegonatejuxojedupoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9750d0ae-2b29-4f79-908d-050fbdc650c8/bewujipu.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_off0000ec8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 5416 bytes
SHA-256: ddf9a4ceebde03b486c17472e7a58c761b7dc532766325caf2bc2238dd6dd89a
font_01_sfnt_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 11648 bytes
SHA-256: aa019010679c5dad422a9f8574c879c8536c58c3c726aed0140b527d3d06f5cc

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