Malicious PDF — malware analysis report

Static analysis result for SHA-256 9752550667f14a45…

MALICIOUS

PDF

83.2 KB Created: 2021-05-16 03:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 987c88927c091a1fe7c777657e68c48a SHA-1: 7bd5c07368cc58316dce7d445606c256f1ea8c1b SHA-256: 9752550667f14a453da7493cb2c84bdc8cb0333345a925b8a98dfd80dbb7632b
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The primary URL, 'https://fokemale.ru/strik?utm_term=what+constitutes+adultery+in+the+military', is presented in a way that suggests it's a search result, likely to trick users into clicking. No scripts were extracted, but the heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links were embedded.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/strik?utm_term=what+constitutes+adultery+in+the+military PDF link annotation
    • http://xedeporib.medianewsonline.com/2781923639.pdfIn PDF document text
    • http://lulodexov.scienceontheweb.net/analog_and_digital_communication_book.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/guardian_wireless_pet_fence_battery.pdfIn PDF document text
    • http://retamos.mygamesonline.org/51990972384.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/jekoba.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/climate_definition_geography.pdfIn PDF document text
    • https://fotaluxig.weebly.com/uploads/1/3/5/9/135973299/zunasulotu-jijosamuzazixev-bomegesidava.pdfIn PDF document text
    • http://mizafaroremida.getenjoyment.net/convert_file_to_word_on_ipad.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/alif_novel_episode_download.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/39539323748.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lawewil.atwebpages.com/regions_in_the_philippines_and_their_provinces.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/abdominal_ultrasound_tech_worksheet.pdfIn PDF document text
    • http://suxazetevuzo.onlinewebshop.net/39965400326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091d4760-5618-48e1-9af3-916def6ebd8b/crown_xti_4002_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/kendo_ui_grid_template_if_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/wojutoduxavukunub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9772b9-53ca-4a05-b3c1-c7165cbdef20/how_to_change_my_voicemail_on_my_lg_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/citra_3ds_emulator_android_github.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/lapijifugavizar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db727c95-0af9-491b-87d9-c2e7ae342861/91542488780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7127b2e-8290-4967-86d4-1229a87f3652/fender_rumble_100_bass_amp.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/sportcraft_tx400_treadmill_weight_limit.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_off00010683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 5292 bytes
SHA-256: 5f5bb2b20a9a38715df4e3323511b042596cdfb6cdac6ac7cc4c9a1949d8ec83
font_01_sfnt_off0001186b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186B 10888 bytes
SHA-256: f9561c8b2719d647d73cb45ee075e9bd97b38f63a5de5921a9cba78c7a3e5b68

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