Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1042bb520dfe08…

MALICIOUS

PDF

79.2 KB Created: 2021-04-11 09:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 617e35144cfaed606a7a64f62d59ab33 SHA-1: 7913bd3cc62f8944fce1c03823a77009515f74c9 SHA-256: 9b1042bb520dfe0821e66c67150a3bf70d85ce2892c61f39b0b2ab7a393bb8ea
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the true malicious destination. The primary URL, 'https://baarspo.ru/strik?utm_term=life+recovery+bible+online+free+download', is presented as a lure for free bible downloads, but likely leads to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=life+recovery+bible+online+free+download PDF link annotation
    • http://woviregawafokal.22web.org/antimicrobial_activity_of_plants.pdfIn PDF document text
    • https://bugasidajuw.weebly.com/uploads/1/3/1/8/131856032/sudobavovij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450634/normal_6005d0593d46e.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/4383548.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448733/normal_5fe2bde9ccbb9.pdfIn PDF document text
    • https://zodukoweferu.weebly.com/uploads/1/3/1/0/131069906/3023632.pdfIn PDF document text
    • https://mafadojidakiwo.weebly.com/uploads/1/3/1/8/131871721/7c6e39.pdfIn PDF document text
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/9194447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5fe76f6233eac.pdfIn PDF document text
    • https://jagewimaw.weebly.com/uploads/1/3/4/0/134012974/1611751.pdfIn PDF document text
    • https://roxejane.weebly.com/uploads/1/3/4/4/134486752/d394b78cd3.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/196c9a2a-5309-4a3a-ad80-6afd8453e07f/90_minutes_in_heaven_movie_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7453fa8-b3fc-4a9d-93bd-e0503d02d6f3/why_we_cant_wait_google_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f15f318-983c-4c3b-9d8d-b2f9c3b99eca/my_cloud_home_stream_to_tv.pdfIn PDF document text
    • http://vugupopoji.epizy.com/59484513567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae31527-309a-4db3-9fc7-fe8de7994b03/how_to_add_new_ipad_to_kindle_account.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59556e5-6129-4ce4-82f2-b78ffc58b3e9/21025302529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe045aa-3b6d-41de-acd1-b7c00d578399/95675538571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5311deb-4ae3-4164-896a-4b6a2cc6ac7d/ranger_reata_boats_for_sale_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf25761-cff2-4ff9-aa17-5256f10ebf6a/93928604640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eb43f7f-464a-4624-b883-30af874a5dde/47532004530.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_off0000f946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF946 5172 bytes
SHA-256: 2e922d187b0d75d5e789707aada6b131b14abb786cefbcc8d6d7e7dfca0687bc
font_01_sfnt_off00010b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0D 10144 bytes
SHA-256: a2b004a373efc2286b08b2e41ddf25c8154a0d0630300db67d2528c3721daf39