Malicious PDF — malware analysis report

Static analysis result for SHA-256 795ab11ecec37573…

MALICIOUS

PDF

75.6 KB Created: 2021-03-12 14:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01a258eebbbf2d8b8ee8645dced291a8 SHA-1: 5e1e36fecb929cdfc52ac096d262bad99e0ffc86 SHA-256: 795ab11ecec375738d034e434365451306b757591eb4f399687ff3fe5f847241
186 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, suggesting a link farm or phishing attempt, with one URL specifically mentioning 'holy bible nkjv pdf' in its query parameters. While no scripts were directly extracted, the PDF structure and the presence of numerous external links indicate a likely attempt to redirect users to malicious content or phishing pages, potentially leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/123?utm_term=holy+bible+nkjv+pdf PDF link annotation
    • http://glasshookahcatering.com/lelutijas1nfdi.pdfIn PDF document text
    • http://ponaxamewimenul.sportsontheweb.net/zidibibojogonamawixanexew.pdfIn PDF document text
    • http://vumajuzatijerak.getenjoyment.net/bhagavad_gita_tamil.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/vinegukumasevubekutija.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/vivitozoninamowam.pdfIn PDF document text
    • http://supportcopyright.net/8208067645sea5b.pdfIn PDF document text
    • http://kofupum.mygamesonline.org/65593276319.pdfIn PDF document text
    • http://ludshop.xyz/the_last_wish_raid_soloootf1.pdfIn PDF document text
    • http://khanapoorti.com/62756830239w2iu4.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/mumedonujotenokeges.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/the_art_of_racing_in_the_rain_dvd_release_date_uk.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/healthy_smoothie_recipes_with_chocolate_protein_powder.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/46999542751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6974b9b2-fc2a-4e9b-9495-84ff65489eb7.filesusr.com/ugd/395280_8c2d5333f6644f59abf30b1bd8e3a62e.pdf?index=trueIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/xunegowijabazizefogura.pdfIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_1e938d297166405e85567be3a637e643.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_0926d9016b8f4c22955173a4d501c913.pdf?index=trueIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_a3e9141463a944bdb6890fcd902039d5.pdf?index=trueIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_8b597683fd454ae3956a4275ad059df3.pdf?index=trueIn PDF document text
    • https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_66494eeb4c6c43b8812156535f289c05.pdf?index=trueIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_bad05677ad554be3a85def63b6af9f56.pdf?index=trueIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_e246a5e53a3d48bb9747dd587a313370.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_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 4952 bytes
SHA-256: 2bcf360393b2a66d29e7bd39819aa49a46218ce59c36eaa2948e7c8e4ff5e44c
font_01_sfnt_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 10728 bytes
SHA-256: 52604efc8f78510cb3abbfa06bc5ce2a156989a8d95b460203e725b250419544