Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9f2bc2c77fe20e…

MALICIOUS

PDF

96.8 KB Created: 2021-03-09 12:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 06e64aab117d2ca4535fd75e05d13952 SHA-1: 5d504e080286956af47f882b61d63a721d2d9e91 SHA-256: 3d9f2bc2c77fe20e42ae426ddf83dfbbe44d0b03a7fb09b51cc7dea74ec325b7
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 0.9996

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://mezovuduw.ru/strik?utm_term=husqvarna+460+rancher+20+inch+bar PDF link annotation
    • http://gamukanemafutu.mywebcommunity.org/problem_solving_gcse_maths_questions.pdfIn PDF document text
    • https://wufomuwu.weebly.com/uploads/1/3/0/9/130969972/lutarexusup_vadetugakelanif.pdfIn PDF document text
    • http://arbitestpark.xyz/4_pics_1_word_onlinerua6n.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/60155507858.pdfIn PDF document text
    • http://kersita.fun/ventajas_y_desventajas_del_medio_de_transporte_terrestreisgdr.pdfIn PDF document text
    • http://xopapen.iblogger.org/accrued_expenses_income_in_balance_sheet.pdfIn PDF document text
    • http://digitalcalakk1.xyz/71335457329b1d2z.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/nuwepewoj-tazekuwikiku-jikiv.pdfIn PDF document text
    • http:///\\\/twitter.com\\\/chainsawsdirect\,\icon\:\icon-twitter\,\title\:\Twitter\},\Pinterest\:{\href\:\http:///\\\/pinterest.com\\\/chainsawsdirect\\\/\,\icon\:\icon-pinterest\,\title\:\Pinterest\},\YouTube\:{\href\:\http:///\\\/www.youtube.com\\\/ChainSawsDirect\,\icon\:\icon-youtube\,\title\:\YouTube\},\Instagram\In PDF document text
    • http:///\/www.bbb.org\/chicago\/business-reviews\/industrial-equipment-and-supplies\/power-equipment-direct-in-bolingbrook-il-57001088,title:ChainIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93981d3-0bca-424c-a051-e3be1de6bff9/sword_art_online_vr_gameplay.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/homophones_worksheets_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/sumerian_cuneiform_symbols_and_meanings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa3b83e-2ee9-4a37-918c-a7535fd8f5f2/mircea_eliade_le_chamanisme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/435e2af8-5aad-493f-8849-efde9f6aeb3c/master_of_the_universe_edward_and_bella_fanfiction.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/bezubaan_ishq_movie_khatrimaza.pdfIn PDF document text
    • http://giwofigu.epizy.com/zagat_guide_boston.pdfIn PDF document text
    • http://putetudufotu.rf.gd/senorakifikumura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3908cee2-e092-47b9-bde8-a6b38b10863f/14718953186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2c386c-9cd9-4c81-8d37-83ed43bcafa1/mupifaziz.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 5660 bytes
SHA-256: 6778e572107d95c27d6884c762608b079681a80cedeb3c0f324da96d924baf41
font_01_sfnt_off000121ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EC 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00012d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4E 11840 bytes
SHA-256: fa4e5129dbfc3aacb4ac6513d07db75a8d308348b46c52907548db51d7d8e2cd
font_03_sfnt_off000155d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D6 9696 bytes
SHA-256: 02a2bfecf9c13dd9fdbedbd2439d989e44cdddc9786debb09e35383f5abacee0