Malicious PDF — malware analysis report

Static analysis result for SHA-256 7571ad8aeb7c46d1…

MALICIOUS

PDF

70.5 KB Created: 2021-06-13 23:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 736d89d5287019f8ffdfd2cd7cc564be SHA-1: 6723346244d56054579f71051ec52c0fd2c96ead SHA-256: 7571ad8aeb7c46d120bc68b1abe4c4d5178cdbd8dd43ec8c838acfdf7c8c63c8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. One prominent URL, 'https://irlanc.ru/pbw?utm_term=maestro+label+designer+activation+code+crack', indicates a lure related to software activation codes, likely to trick users into visiting a malicious site. The document's structure and numerous external links are indicative of a phishing or malware distribution attempt.

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://irlanc.ru/pbw?utm_term=maestro+label+designer+activation+code+crack PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447276/normal_5fc81983bab99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468823/normal_5fca7b824bcf1.pdfIn PDF document text
    • https://jikidamasot.weebly.com/uploads/1/3/4/8/134874174/fokega.pdfIn PDF document text
    • https://wuziwewaramided.weebly.com/uploads/1/3/4/3/134311070/ccfb9267.pdfIn PDF document text
    • https://lokawerimi.weebly.com/uploads/1/3/0/7/130776865/451986.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481061/normal_5ffa08145dbf6.pdfIn PDF document text
    • https://zitipijasidigor.weebly.com/uploads/1/3/0/8/130874434/fafuze-pudijub-dunigarowikesiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481671/normal_60c4b942b4b1e.pdfIn PDF document text
    • https://fizinulemid.weebly.com/uploads/1/3/5/9/135981283/7e116.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/gajofupexetobi_xapumoredojotul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465264/normal_60c54ae0eca57.pdfIn PDF document text
    • https://zaxivufib.weebly.com/uploads/1/3/5/3/135306799/b69bd18.pdfIn 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/e034adc0-7131-4e37-8cc7-a7f6097f4b35/envision_math_2.0_grade_3_workbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762b14e4-152f-4d74-ac6e-cd6c51944b80/paris_regional_family_clinic_paris_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15895b48-15cf-41bc-bca7-fc457add51a2/maze_runner_cast_dancing_to_wobble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca7fb308-24ab-4baf-b0a0-c1f10f4f83b3/mdi_spacer_instructions_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ef6eb3-cc14-4115-946b-94217e7f2492/innovative_project_ideas_for_covid_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53977c5-86e0-4ad4-93e4-48fe70513bd6/grade_1_writing_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c24d1f7b-4157-480a-93c6-8c712833fa17/dejukoxupadipesovejugiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf817247-7f30-48cb-8ca5-6db4cf903a8e/python_pandas_data_analysis_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/496998ab-94aa-4103-8c16-0f8af9b99c28/the_greatest_miracle_in_the_world_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66cca41f-38ef-4167-b35d-c2b00a5bb552/guwasezebeziba.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_off0000d6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A5 5376 bytes
SHA-256: 27e50864e37ed7d5e3255cf4603a93e543e024a09bbaa547cf916098df1f0bd4
font_01_sfnt_off0000e90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90E 10408 bytes
SHA-256: 6d7e5dbccef27f3222a269a584dd2a5b8f009121885bfdf85568b430f68206fe