Malicious PDF — malware analysis report

Static analysis result for SHA-256 875187ff45665424…

MALICIOUS

PDF

78.3 KB Created: 2021-03-24 13:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c7be05f98edbfcadd10b0354957cf9f1 SHA-1: 59aaf0a3f4f2a66870878e421264486f9d229013 SHA-256: 875187ff45665424b7ea076d4c5d465b40c938683d381e18bd55c61da60b59c8
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one pointing to a suspicious domain (jumiwimov.ru) that is flagged as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent. The presence of embedded URLs suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=romeo+and+juliet+act+1+quizlet PDF link annotation
    • http://trendmobile.ru/sovivosazidus0yc5n.pdfIn PDF document text
    • http://lg-copyrightforms.com/pedometer_step_counter_onlinen06ip.pdfIn PDF document text
    • http://kprovk.xyz/negenivopetabosoqhj62.pdfIn PDF document text
    • http://xavesavegi.22web.org/brain_teasers_investment_banking.pdfIn PDF document text
    • http://tunizunifegitof.66ghz.com/68761951251.pdfIn PDF document text
    • http://umdtheatre.ru/2012_club_car_precedent_repair_manual8522k.pdfIn PDF document text
    • http://joxorapux.22web.org/declaration_of_trust_property_template_uk.pdfIn PDF document text
    • http://fb-ig-violation.com/hansel_and_gretel_2020_age_ratingenwpy.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/87b2377c-71e7-41fe-9493-ce64b33849f5/how_many_carbs_are_in_a_wendys_southwest_avocado_salad.pdfIn PDF document text
    • http://leligikolapib.epizy.com/65762390713.pdfIn PDF document text
    • http://zasegusof.epizy.com/lusasemosoze.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/software_development_company_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67092fc9-5dc3-41a7-ae28-6e771c1db88b/how_to_draw_a_christmas_tree_easy_for_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba24d029-f5b9-4350-8708-9076919f0007/life_skills_training_for_adults_with_disabilities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd3c23c-436e-41e6-8a50-81e86081d8bd/47035695844.pdfIn PDF document text
    • http://puzekuzabi.epizy.com/nogefarinobiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e25b763-b9ee-4b95-bd63-77eb8a2fa36a/maytag_front_load_washer_and_dryer_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/senido.pdfIn PDF document text
    • http://raredinufewota.epizy.com/wetidokameti.pdfIn PDF document text
    • http://bolomad.epizy.com/economist_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e88df91c-738e-45c6-b3a7-6a4a1c43d2a9/2016_form_1040_instructions_tax_table.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_off0000f640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF640 5120 bytes
SHA-256: e3e4face8e64343f975fdd355b34b31c5fe3581ec6a8967d1469bdc332e90fc3
font_01_sfnt_off000107ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AE 10756 bytes
SHA-256: 5e04aa240d7acd1e3d3989949d9e2f49d40c506b0687df014581e49f65c3b1ae

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