Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4ba8228399540b…

MALICIOUS

PDF

88.6 KB Created: 2021-04-11 14:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8be9bdc5667e917136a91215a6bfd3d3 SHA-1: 8065c8d0255c09ec9e25c4c2b03b831769ff0719 SHA-256: 0e4ba8228399540b0e0158413ce7fa018afe9c8a8a7dbade37b70ee1285e00f5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The presence of a URL like 'https://jumiwimov.ru/strik?utm_term=why+is+my+schlage+keypad+not+working' indicates a lure to a potentially malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/strik?utm_term=why+is+my+schlage+keypad+not+working PDF link annotation
    • https://betetaguzom.weebly.com/uploads/1/3/2/3/132303315/xutifaluwaxoj_jiwerideratogu.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/sudaxamelejofiba.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/fagetaworazosuj.pdfIn PDF document text
    • https://kuwodugedo.weebly.com/uploads/1/3/0/7/130739904/gawul_duxovur.pdfIn PDF document text
    • http://devuweza.scienceontheweb.net/88804737036.pdfIn PDF document text
    • http://mokajuziwasuto.22web.org/autonomous_annalee_newitz.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/e94b622c9a2788b.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/node_js_html_page_to.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/confederacy_of_dunces_movie_2015.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/xozipovisamujupofi.pdfIn PDF document text
    • http://tidedejix.iblogger.org/invertebrate_cladogram_worksheet.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/19a04d80-6c0b-43dc-89d6-35ca35b49837/81696359521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407ce009-c271-4529-b2ba-f2e15eb550ac/easa_crew_duty_time.pdfIn PDF document text
    • http://lonesopuw.onlinewebshop.net/fijovozip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b35d412-b30f-4abd-a218-66ee41444948/short_love_poems_for_wife_birthday.pdfIn PDF document text
    • http://woxikajir.myartsonline.com/biological_causes_of_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/14356357919.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/98219318993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144dccab-5fee-41d5-9475-d584252f8487/63006514122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f7692f-8e5a-4cf8-8957-4f3bb067f99c/wexawezoxeveja.pdfIn PDF document text
    • http://zijurape.atwebpages.com/mathematical_critical_thinking.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/exponents_and_scientific_notation_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/does_the_us_federal_government_have_the_death_penalty.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_off00011979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11979 5756 bytes
SHA-256: 5ab468f4afff5b0474b58d591b4e48c54fb534cb75182a1bd4529f537b3ee8ce
font_01_sfnt_off00012d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0C 11632 bytes
SHA-256: 642beb6144b93bb9a7f2f7609f60aedb4c217828ce240bc2b13ed466b2f807d9