Malicious PDF — malware analysis report

Static analysis result for SHA-256 818dab0a685155be…

MALICIOUS

PDF

83.9 KB Created: 2021-03-15 18:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0faf68053cce30c6bff80c626c2cd709 SHA-1: 4dd46191d47fe99c2a7a7192dbecc2c7fd1e386d SHA-256: 818dab0a685155be04af3783fd99157e6cb0201a5c2fb22a916a3f70e27b8265
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which is presented as a 'biogas project pdf download' to entice users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is part of a link farm designed to obscure malicious destinations.

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://soxebez.ru/award?keyword=biogas+project+pdf+download PDF link annotation
    • http://sedovarubabozop.iblogger.org/danetarujogadidulelufuw.pdfIn PDF document text
    • http://greatmasters.biz/zawetotarizezagodigukozib1yrpg.pdfIn PDF document text
    • http://fasad-dom.site/aplikasi_convert_word_ke_freezuekr.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/zagomewopifewuwo.pdfIn PDF document text
    • http://trikotoria.ru/legofiwomodidabepirly0zg.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/nutogepizoxuw-xexekov-zoxiruvupemuj.pdfIn PDF document text
    • http://vnatural.space/fitilowaxutifovesuzixekiv4decm.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/doa_surat_al_waqiah_latin.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/3458c314.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/lg_soundbar_nb3530a_mounting_bracket.pdfIn PDF document text
    • http://datulosuwila.iblogger.org/2700212065.pdfIn PDF document text
    • http://gijaninapumobe.sportsontheweb.net/xoxexegu.pdfIn PDF document text
    • https://salabupomisopef.weebly.com/uploads/1/3/4/6/134631393/bd549a4.pdfIn PDF document text
    • http://instapresent.site/microsoft_excel_2010_vs_2016udchs.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/95007501615.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nadurajamewe.epizy.com/45930114580.pdfIn PDF document text
    • http://rezapemez.epizy.com/tovalujafaxukumufi.pdfIn PDF document text
    • http://fivinilon.rf.gd/37470516341.pdfIn PDF document text
    • http://sigakew.epizy.com/alesis_dm10_mkii_pro_user_manual.pdfIn PDF document text
    • http://gajibapudi.rf.gd/jabogedidigirekez.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE889 5328 bytes
SHA-256: 85096c34a756b3bc2845bef87a6764b0ede4202ddc92fe01d5ba920e8d08d0e4
font_01_sfnt_off0000facf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 10432 bytes
SHA-256: 50b371760cd7859f763557497a5eaecac3bb6c39f11bf657252798033f8da0fe
font_02_sfnt_off00011eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB2 16132 bytes
SHA-256: e1c0be1f083949b69301fca371b50a13b2e5d6d7a534d85b46ff30d714689a59
font_03_sfnt_off000133a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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