Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9baeecaa4f04225…

MALICIOUS

PDF

81.0 KB Created: 2021-06-12 12:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e04c78de4bc2c2d367945356096839b8 SHA-1: aa4da9459d47d031d24c80b74c7319e9f9c187a3 SHA-256: d9baeecaa4f042256e4592269d5ea8ae457aba9043219dc47387d523ed4ed18b
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL `https://soxebez.ru/123?utm_term=bodmas+calculator+apk` is likely part of this scheme, attempting to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=bodmas+calculator+apk PDF link annotation
    • https://kilobabax.weebly.com/uploads/1/3/1/8/131856311/kanikuvonagofar_rozimavaxog.pdfIn PDF document text
    • https://zaradokoz.weebly.com/uploads/1/3/4/6/134656685/3492465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420915/normal_6064e96d49394.pdfIn PDF document text
    • https://lerofazoneku.weebly.com/uploads/1/3/5/3/135314691/ladenuxinij_botemet_wikoreza.pdfIn PDF document text
    • https://mamowoxu.weebly.com/uploads/1/3/4/2/134265364/4990438.pdfIn PDF document text
    • https://wobofosowipifir.weebly.com/uploads/1/3/0/7/130776138/modogazaviba.pdfIn PDF document text
    • https://kuratoso.weebly.com/uploads/1/3/4/3/134329811/dcfd3.pdfIn PDF document text
    • https://foravidamekog.weebly.com/uploads/1/3/2/3/132303307/98b38ac5dd681d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_60bfe82d1dc0d.pdfIn PDF document text
    • https://suliwire.weebly.com/uploads/1/3/4/6/134650608/1468164.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://misabovu.pbworks.com/w/file/fetch/144570972/34839242191.pdfIn PDF document text
    • http://guvevef.pbworks.com/w/file/fetch/145162926/65389505501.pdfIn PDF document text
    • http://xuwedateredu.pbworks.com/w/file/fetch/144749919/santo_rosario_catolico_completo.pdfIn PDF document text
    • http://bijopozo.pbworks.com/w/file/fetch/144974793/cinderella_1997_full_movie_free.pdfIn PDF document text
    • http://zovafidat.pbworks.com/w/file/fetch/145168470/vaaranam_aayiram_hd_video_songs_download.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144507495/lugefamirikixukekaw.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/w/file/fetch/144475224/69272363423.pdfIn PDF document text
    • http://fevosezew.pbworks.com/f/nipazesenurapolil.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/w/file/fetch/144452340/sadlier_vocabulary_workshop_level_b_unit_6_answers_synonyms.pdfIn PDF document text
    • http://giribuv.pbworks.com/f/home_network_setup_services.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 4940 bytes
SHA-256: 6d7b893fea0f92fc988e328d2e71b9ceb5f7dd52f1f8f1fa407037c6965325d3
font_01_sfnt_off000101ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EE 11420 bytes
SHA-256: 121ee79a782a3313e8ab9aef60b2f0849cbe6e9fc3b901742d998e80acf2d1a5
font_02_sfnt_off000128ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3