Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d75bb308a6e34bd…

MALICIOUS

PDF

99.8 KB Created: 2021-05-15 13:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 724f6a8a5744977dab103279fcc0c12a SHA-1: 2ae92681168d2c786dc6220153a4e9bb6c142927 SHA-256: 1d75bb308a6e34bd18e38a5d2cd0d774b59b03f8d811268076ec49b56e161a00
206 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One URL, https://xajibur.ru/strik?utm_term=the+crown+season+1+episode+9+painting, appears to be a redirector. The presence of PRC/3D content and duplicate object bodies are also suspicious indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://xajibur.ru/strik?utm_term=the+crown+season+1+episode+9+painting PDF link annotation
    • http://kevotefanevodaw.iblogger.org/51224270338.pdfIn PDF document text
    • https://nerupeke.weebly.com/uploads/1/3/1/4/131483009/96f46c55.pdfIn PDF document text
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/57624b10f048f.pdfIn PDF document text
    • http://zivobopozirovi.22web.org/sickle_cell_anemia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446259/normal_6041f1e9c02d0.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/misewewajipopomab.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/11139272612.pdfIn PDF document text
    • https://gupovokezatiku.weebly.com/uploads/1/3/4/8/134878629/5a46d06728b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375210/normal_5fec2c2a7ac4f.pdfIn PDF document text
    • http://narawodosure.medianewsonline.com/crossword_puzzles_easy.pdfIn PDF document text
    • https://kujutokisomodu.weebly.com/uploads/1/3/4/6/134662527/936d19bb56c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://solugivewatewa.myartsonline.com/loxawegasosibutijet.pdfIn PDF document text
    • http://tosowepexinuf.epizy.com/atm_ka_full_form_kya_hua.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5a0999-2908-4de7-bc01-0c20ebd4d38b/94595938043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb319d7-2011-4dea-bb2b-5a943de3e898/note_taking_worksheet_properties_and_changes_of_matter_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf1b11c-3b81-4721-8aee-c4ac978194e0/fivenetapirexibup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec50b880-2c83-4ede-b2f6-9ed0cf16ea1f/apple_iphone_5c_case.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385bf162-82c5-48dd-8701-2d3f9b6066ab/jadeperujuzopowuloxuzerop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f30009-7484-4cf3-98ec-4ac266edf521/is_flipping_profitable.pdfIn PDF document text
    • http://palojolasorut.rf.gd/american_anthem_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edadf2c-6764-48fd-bed6-9316ea232678/sherlock_holmes_movie_download_in_hindi_480p_bolly4u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34cff828-19a4-44ac-8c4a-89f09e65cda4/tokavidiselo.pdfIn PDF document text
    • http://fuvituze.epizy.com/sulepevefixadoxitasaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c932fdb3-a4fc-41a3-b22e-157fe8c5e729/94619560822.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_off000147db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DB 5552 bytes
SHA-256: 70888419acf0e5dffa00854e30eb90345d69cf8ab2697d0028da6d154219c6c4
font_01_sfnt_off00015ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ACE 11504 bytes
SHA-256: 6db793344cb888cf9d30d7ff18c65862e643d695faeb5647469c257aa9d89cc7