Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba44ad8da8c1ab4…

MALICIOUS

PDF

85.2 KB Created: 2021-04-18 13:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 231da9f8506d702363d3ce88c105d04d SHA-1: 4e4c20d393284e3e48cc29b19615d52460a07343 SHA-256: aba44ad8da8c1ab49de2d1f879813fc7e5f19686996ef4a12a0231a6dcb3b232
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which point to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the overall structure point towards a spearphishing attachment, likely designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=turbochef+pizza+oven+service+manual PDF link annotation
    • http://uchebnoe.website/rilexukogutilufepumen63e2m.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/vatem.pdfIn PDF document text
    • http://bullbananavannaone.xyz/863598260564jky4.pdfIn PDF document text
    • http://keepqifi.site/joyce_arabyrst5j.pdfIn PDF document text
    • http://itdomen.fun/zozogabatonesaviroka27aaj.pdfIn PDF document text
    • http://korixoludofuguk.scienceontheweb.net/fiboruroragafajubuniwajir.pdfIn PDF document text
    • https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/delefasafepom.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/accountability_partner.pdfIn PDF document text
    • https://satiragekawojiw.weebly.com/uploads/1/3/2/7/132740750/gisazunir.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/online_autocad_tutorials.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/vuwoxeloxixusivoziw.pdfIn PDF document text
    • https://xebokedobonu.weebly.com/uploads/1/3/4/7/134719403/nutixutofatadejejuf.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdfIn PDF document text
    • http://arthromedshop.xyz/733013644400lkrf.pdfIn PDF document text
    • https://zugepopudodeg.weebly.com/uploads/1/3/4/6/134688503/tonajukovuk_rutetado.pdfIn PDF document text
    • http://kizunawinim.getenjoyment.net/favebutilemulo.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/abacus_maths_notes.pdfIn PDF document text
    • http://pasipodo.mypressonline.com/58108733557.pdfIn PDF document text
    • http://yogist.fun/jajifiropaguzefawrguvg.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/22418117-9789-44d8-8318-3ee07dfd286a/driver_hp_p3015_windows_10_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6baa0ba6-98fa-4aac-ab09-bb7e2ab89115/42242475847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4aff709-a1ec-4f27-b6b4-b55143b1b230/88198910308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42dfc00-a5db-4299-a738-3e0e64915ae9/gisuzivikad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117f05a9-0a37-483e-b944-1c3af44394b5/navfac_design_build_rfp_template.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/31146068868.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_off000110cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CC 5456 bytes
SHA-256: 1d981de2a1721585f75255ab2364fc397de7f0e702064536338b96a8bc46305c
font_01_sfnt_off0001233b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233B 10552 bytes
SHA-256: 902caaf5b8fd7f2d39f0e9f0ac2be651b9bfe0776e16133ff832f1d008d426a6

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