Malicious PDF — malware analysis report

Static analysis result for SHA-256 c296bc34485252ed…

MALICIOUS

PDF

87.0 KB Created: 2021-03-22 09:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c930ae6a175eae98a593a43815ef9778 SHA-1: 9eb0e211288e66dbe9307caf7d3c5e826c239d73 SHA-256: c296bc34485252ed6a0695695e458fa2476cb4e2f6fc1d1e5372d9bd92797561
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/award?keyword=centripetal+force+problems+pdf PDF link annotation
    • http://astropsychology.website/tegefusunexaxu9a6dt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_60543c0189c18.pdfIn PDF document text
    • http://reassurez-moi-fr.info/zagugiruzabedqqy.pdfIn PDF document text
    • https://zimosamizafokox.weebly.com/uploads/1/3/6/0/136091721/vujekofixezixidug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_6052ae93cd043.pdfIn PDF document text
    • http://triple-doska1.club/493896738788rqzg.pdfIn PDF document text
    • http://zeropium.com/fildo_for_windowskijp3.pdfIn PDF document text
    • http://erogan-encolumbia.site/computer_graphics_principles_and_practice_second_edition_in_c83jvq.pdfIn PDF document text
    • http://idealslim-ordina.site/what_is_the_formula_for_rotational_velocity8xlt9.pdfIn PDF document text
    • http://cyberghost.store/cambridge_english_starters_1_for_revised_exam_from_2020mj186.pdfIn PDF document text
    • http://sweetygirl.club/45207413641u4n3l.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/saziperufen_nexulu.pdfIn PDF document text
    • http://shop-profildoors.ru/cost_of_samsung_galaxy_s9_plus_in_nigeriaf76az.pdfIn PDF document text
    • http://good-production11.site/12671534158udz23.pdfIn PDF document text
    • https://komiwafaka.weebly.com/uploads/1/3/2/7/132712661/9237228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5fff6f6323bdf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_22cf8025fab74c69a4addfb0cb2c2b9e.pdf?index=trueIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_1b9133cf341a4f4d8119dc9df380c4c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a40f079-4241-4f6c-bbe2-7c6c6b957288/sipineviraxixuxum.pdfIn PDF document text
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_2c416090704946f89572c3e281c8e101.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7d87ad-40c2-447c-a392-f2ac19d917f1/sasetirosuzusijikatatises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7202c506-3e71-4538-9f0e-ddc4a3940ad1/14834907046.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_3a02eca579f64483918ed8609258f730.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_996dccf2a6474fe6b791c0e3ea3d0dfd.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_off000113b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B2 5344 bytes
SHA-256: cb4e0faaef11d6a0d132015162c331c94df3747697f773e9624e0e5ee3bb8b81
font_01_sfnt_off000125bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BC 11996 bytes
SHA-256: 056acd88e78214df2206b4ca82c9c2ee241a8236c0b0a2fc676de62ceb861f39