Malicious PDF — malware analysis report

Static analysis result for SHA-256 da47d0127763aa2c…

MALICIOUS

PDF

103.8 KB Created: 2021-03-23 03:55:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e33b2258d6076d87562dc3f3c7d657f6 SHA-1: c1516f1860bfd6bdc8ae19e566e427af1a958f54 SHA-256: da47d0127763aa2c87d3502f79af1a8593dc49c4a5c5fa95b649a3069eb118a0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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 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://kuzutuzo.ru/strik?utm_term=hp+elitebook+8540w+price+in+kenya PDF link annotation
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/a8a489308ef9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_601f03ccf342b.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/how_to_put_up_word_decals.pdfIn PDF document text
    • http://kagotigidiwijar.iblogger.org/60566118292.pdfIn PDF document text
    • http://funokeronox.iblogger.org/xafafezawades.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/how_do_you_convert_julian_dates_in_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380680/normal_6005514a30214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_601f61b2ef019.pdfIn PDF document text
    • https://baxegirugono.weebly.com/uploads/1/3/5/3/135319521/mozaxujuteva_litajipudenati_wifemax_rakidokotigulib.pdfIn PDF document text
    • http://linefesejewug.sportsontheweb.net/cursive_alphabet_writing_practice_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5fdff68d88f8a.pdfIn PDF document text
    • https://mikixobitesa.weebly.com/uploads/1/3/0/7/130776626/503391.pdfIn PDF document text
    • https://puvedevedumu.weebly.com/uploads/1/3/1/4/131406841/kaboma.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/international_mail_tracking_india.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mozutulobiris.onlinewebshop.net/windows_server_2012_r2_history.pdfIn PDF document text
    • http://liforese.epizy.com/32249143632.pdfIn PDF document text
    • http://zutibebasonuf.epizy.com/luster_crossword_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf378ddc-0ff4-4b71-b23d-4defec1b2e09/woveruvezinidujisatiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654e56ef-f90e-419e-bf6f-f67b755452a7/sefer_raziel_hamalakh_espaol.pdfIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_06a08e6cd37b4c5dad0dc816dc8f930c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee27113-3a0a-49a1-9422-63e42a75275a/lunijanidesusuwikolim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b2a98a-e3f7-46db-a8c0-d2f50c8fca2d/guwexesijinufud.pdfIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_227a66e2510e4b47bfefbda71ac9790c.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000135a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x135A2 13896 bytes
SHA-256: dd69e53d5a011d909e690fd8d4db84529c4c5fed43711e09924574defe08970f
font_00_sfnt_off00012236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12236 5656 bytes
SHA-256: 9d3e4700438a81140c583e288488a22121474590d58be8e4fe405bccc7bbf155
font_02_sfnt_off00015c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C67 18084 bytes
SHA-256: 9f7e6d2949d1c928b6a49d07a2968f839a50b5babb100e1c71e92e2c2431c938