Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbefbbac973822bd…

MALICIOUS

PDF

72.1 KB Created: 2021-06-09 20:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3bc7519d39680a3be699628d63fc740c SHA-1: 400218eab063d783619bae456df6f1506f03f3a1 SHA-256: bbefbbac973822bdbfa03fbc87f18d4e654aa3b64b5f4deb2300d90b3cfb8e39
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external links to various domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cructi.ru/pbw?utm_term=sentences+with+plural+possessive+nouns PDF link annotation
    • https://felomogolupa.weebly.com/uploads/1/3/4/3/134345494/fofak.pdfIn PDF document text
    • https://voresefum.weebly.com/uploads/1/3/0/8/130813922/foxokobuj.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/7548657.pdfIn PDF document text
    • https://tufajunij.weebly.com/uploads/1/3/2/6/132695836/koporebuta_sibutapepujalix.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/fabe765e-db89-442c-b074-9596fad8c287/devoir_interactions_fondamentales_1ere_s.pdfIn PDF document text
    • http://torefobomuzu.pbworks.com/w/file/fetch/144773517/tosinonerilikunojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf01f3f1-0d20-4c0a-8ac7-9c9d9a38d015/8910431536.pdfIn PDF document text
    • http://dusozivelas.pbworks.com/f/class_5_maths_decimals_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ceebcd-804b-477e-ab42-c50cc77cf73b/how_much_do_ethical_hackers_make_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc595ea7-c769-42f8-889d-0d426dc27a45/83031886029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b577a20d-cd6e-4925-b861-f218e9901d7b/what_is_definition_of_terms_in_research_example_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8e749d-68cb-45a3-bca3-9dcb6230a9a6/kunubedogejapaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6baf2ec-dc94-48e8-9814-cc6be792c2d1/ferdi_tayfur_filmi_izlemek_istiyorum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fa7ed6-2b06-404b-a398-20db0241760e/veferufozevodaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df486a56-ef0f-47a3-aa04-e564bd4bd305/81980350288.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144455880/problemas_matematicos_de_suma_resta_multiplicacion_y_division_para_imprimir.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_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 5276 bytes
SHA-256: c33a9ec6e5ec7ed236324004e9c5c63b82b70a004b60e031be46ebaaf3a0a23e
font_01_sfnt_off0000eeec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 10600 bytes
SHA-256: f253ab75558ada8328e6cdf11d4e81541ad3939fdd21f5c603eec9fa058f3b42

Open this report in the interactive analyzer, or submit your own file for analysis.