Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb375b78ca38ef44…

MALICIOUS

PDF

79.7 KB Created: 2021-04-05 03:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 79ea1b6658f374b404fde4cfc4353a56 SHA-1: 52e992eb67ee2b320e89b8f69650418a37e7ed96 SHA-256: eb375b78ca38ef44e9028f82938ba7a7abc438b326a5c14b0ac713a95b59f114
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/aws?utm_term=sunbeam+bread+machine+manual+5890 PDF link annotation
    • https://cdn.sqhk.co/jurugaguvedu/fhaejcs/shellfire_moba_fps_apk.pdfIn PDF document text
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/9498398.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/rekeposezifuvivamafuni.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/3_axis_cnc_machine.pdfIn PDF document text
    • http://xunusemek.22web.org/what_is_the_structure_of_a_specific_academic_text.pdfIn PDF document text
    • https://bolamowoxuwev.weebly.com/uploads/1/3/3/9/133997192/kelako_dubekifa_ragunupilomozi.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/duvonekebawulojekuk.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/3595086.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/egcghCO/nilutazewizitenibixuso.pdfIn PDF document text
    • https://ruxesewafemowur.weebly.com/uploads/1/3/4/7/134761388/butesuxopebafi.pdfIn PDF document text
    • https://cdn.sqhk.co/xewumoxu/kdGgiS4/gao_veobecn_a_anorganick_chmia.pdfIn PDF document text
    • https://cdn.sqhk.co/vujejanar/JuZjtih/22527525049.pdfIn PDF document text
    • https://xokizaneg.weebly.com/uploads/1/3/4/8/134886830/gukuk-sesutagivuxe-zasabuvikir.pdfIn PDF document text
    • http://satumatajug.iblogger.org/free_business_letter_templates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wusone/tamil_movies_2019_app.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/converting_decimals_to_fractions_to_percents_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0b6cf6-8abd-43af-b943-5d32bdaebd80/8190747681.pdfIn PDF document text
    • http://lutubipejor.rf.gd/mokulagubowoma.pdfIn PDF document text
    • http://bapavemofupis.rf.gd/the_private_life_of_chairman_mao_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc188a0-022b-4327-9546-f9cead3d5b8e/sekimitefodaruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e6729f-69eb-4d90-bcfb-5a6307a9f72a/7982922063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49938b93-6ccf-48ab-bce0-b633f5bbf2df/mofesalefevajes.pdfIn PDF document text
    • http://nezenomawaza.epizy.com/immortal_life_of_henrietta_lacks_movie_worksheet.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_off0000fa1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 5860 bytes
SHA-256: 515b2a9a58a8d4d459fb8fa5ab026049d8dd2724356afef3a03ae675c9597dc5
font_01_sfnt_off00010de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE3 10932 bytes
SHA-256: 4431b6ba5a198445ab2be62e393bfb6e7ab7de0605c5801fd2cd35c5ccbc7ce2