Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5acede57b9d141…

MALICIOUS

PDF

91.6 KB Created: 2021-05-25 06:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 730451925f9233651bf45ab03a02dd3c SHA-1: d423e1bc42ea0e89bbcbe9963447aba583812b3c SHA-256: 3a5acede57b9d141c40d4ba71de542f5eefe6d6c0a89324593aec14ef6d3a81b
126 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The primary external URL, 'https://gimoguvi.ru/strik?utm_term=libro+romeo+y+julieta+resumen+por+capitulos', is likely used to redirect users to other malicious or spam content. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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://gimoguvi.ru/strik?utm_term=libro+romeo+y+julieta+resumen+por+capitulos PDF link annotation
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/a6bd0053623e2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366957/normal_5ff3e95d6ccbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5fd6f9cf8967f.pdfIn PDF document text
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/newelazifeti.pdfIn PDF document text
    • https://wiriresakuboso.weebly.com/uploads/1/3/4/2/134236055/kifeziv_gisurizubo_lilavunevilamaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471236/normal_5fcac4da1ab56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379049/normal_5fc765d7e43a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491437/normal_5fc9bb7acf402.pdfIn PDF document text
    • https://disabamabasato.weebly.com/uploads/1/3/1/0/131070072/xukutiden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5fdb3c5a36b58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471704/normal_5fc8ceec7c056.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/22db5e6d-50af-4733-8d9a-e11d2cf68dd5/burger_king_menu_with_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da0a1eb8-47d0-45aa-8ca5-ef1a3f4da686/sifapotezoniwapufuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8656cffe-5881-4900-9ebe-3f8af5aee42a/how_to_use_ryobi_router_r163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f02d09-0801-4c4b-87cd-47af76a81ed1/kuzanevotozebatisidobex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/629f04b9-1d4b-4447-a4d0-b6e1c08f7826/can_you_notarize_for_a_family_member_in_illinois.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/lewanajubanezejosumubod.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/arduino_nano_expansion_board_data_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e0ab6e-63b2-4af9-a98d-2bb141d627b5/stories_to_read_your_baby_in_the_womb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ed8ea2f-5017-4cdb-8874-75b84775e924/how_fast_does_a_roller_coaster_go.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/esophageal_perforation_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/ion_turntable_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89adefe4-a18c-4173-8c65-57997bef5851/joziguxupumovewaloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce12263-22dc-4afb-b423-bcf325a76af9/altec_lansing_boom_jacket_pairing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA1 1572 bytes
SHA-256: d5d49a807764148dbc67d6eca26374f7d919483ed4a9ca81873178d4ac8c9a27
font_01_sfnt_off000125a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A4 5340 bytes
SHA-256: 1cedb5ad5e16c28fc42fcefd77bd14a114911cd7cb5513cf73c4cca2608b097d
font_02_sfnt_off000137bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BD 12116 bytes
SHA-256: cdcbb8975801c2a49cd05e44fe6df9e179763168d463ae6249991e746d155fe2

Open this report in the interactive analyzer, or submit your own file for analysis.