Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3482a1532e17b3…

MALICIOUS

PDF

82.1 KB Created: 2021-05-27 18:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e25580aaca9207ac17b18e101eed811a SHA-1: 2cfe5db14c5aa5ad113a5bc28660399deb1ca232 SHA-256: dc3482a1532e17b3856207d34bf86829835c91eeb2a8de17917ea201e34a02a7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to PDF files hosted on various platforms, indicative of an SEO link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://golowaki.ru/strik?utm_term=netgear+arlo+pro+base+station+vmb4000+manual PDF link annotation
    • https://dinuboxisoxim.weebly.com/uploads/1/3/1/8/131857966/09ece00cec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5fc9699769dce.pdfIn PDF document text
    • https://noguvipeves.weebly.com/uploads/1/3/4/7/134717425/9001824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476580/normal_604199bd21bd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489730/normal_5fca695b105f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451221/normal_5fcd8d403d4bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_6008722c7d581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426966/normal_5fffd77337dd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372072/normal_5ff90a36aab57.pdfIn PDF document text
    • https://tedaliduvif.weebly.com/uploads/1/3/5/9/135957254/soxijujeku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_600d7d072c4eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_605584c68e216.pdfIn PDF document text
    • https://vipamabukaxeban.weebly.com/uploads/1/3/0/8/130874648/8026178.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/c1da7c18-c1b9-40a5-a68b-6792c9a2d806/54266930076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b776b2-eafe-4384-963d-2d4e890b1ae5/is_there_a_free_diary_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e419f7ea-34a3-4e78-ad30-d49ec58a9c9d/79384895439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a664e6d-a712-4a50-8451-0650718a528b/nafaxefokemup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d805c4-dbcf-4cf1-8cc8-8a292fad96a3/how_to_make_google_search_private_on_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6221908a-c9eb-4e3c-bc71-ff1e386fcd85/jigobosumijap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74498e16-7311-4376-91b2-8a60d4c4c06e/96771959628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503f8965-8f74-4da2-9ace-b764fe784fed/84240503497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393c972c-a9be-4477-a115-6e3fef777313/best_self_cards_courage_over_comfort.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644170e9-8a3e-48cc-8705-39aa108b6ec0/vitapur_bottom_load_water_dispenser_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca351804-f9f0-41c8-941c-5f24a031fb06/alfabeto_en_manuscrita_mayusculas_y_minusculas.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_off00010216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10216 5536 bytes
SHA-256: 5ce7b0ff802caee2963bb6a0f11ef161d7071011474c8484635307485dd2ae32
font_01_sfnt_off000114e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E9 10920 bytes
SHA-256: f0974f05ecb71d57c24ee83d46396136e92cb6cf433bd595d54fafe6cb0e70ec