Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef32b20209e7f3d5…

MALICIOUS

PDF

70.5 KB Created: 2021-06-03 20:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c76f5c642550de8234cbeff1162c6c9b SHA-1: eeba514a4fbc174807e9fce7b87e270e019158cd SHA-256: ef32b20209e7f3d59438c10eddf86b6ee76146ca626faf7d5bbba4dd4af198b5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary URL, https://inwebjor.ru/pbw?utm_term=pelicula+completa+en+espa%25C3%25B1ol+de+annabelle, appears to be a lure for users searching for movie content, likely to redirect them to malicious sites or initiate further downloads.

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://inwebjor.ru/pbw?utm_term=pelicula+completa+en+espa%25C3%25B1ol+de+annabelle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5fdac5e5b5fc5.pdfIn PDF document text
    • https://zogabugopevaluz.weebly.com/uploads/1/3/0/8/130814784/bidilizod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_60384f20d0cfd.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4421476/normal_60b20c6171e8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_602da70e669d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404959/normal_6065764f70b97.pdfIn PDF document text
    • https://felinabaf.weebly.com/uploads/1/3/4/3/134380667/1704564.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4468814/normal_60b21d3fb0280.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494140/normal_5ff4cffd0769e.pdfIn PDF document text
    • https://zorajifedimak.weebly.com/uploads/1/3/1/4/131437130/1147529.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://dadilotofexi.pbworks.com/f/sajowodomekozuweperuwajo.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/baudrillard_simulacra_and_simulation_disneyland.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/f/pelulazumogavi.pdfIn PDF document text
    • http://xodelow.pbworks.com/f/my_favorite_chaperone_story_elements.pdfIn PDF document text
    • http://molitutolu.pbworks.com/w/file/fetch/144554574/terraria_sky_base_download.pdfIn PDF document text
    • http://sisagexal.pbworks.com/f/landscape_history_and_the_pueblo_imagination.pdfIn PDF document text
    • http://xutosop.pbworks.com/f/dead_cells_100_save_file_1.7.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_off0000c622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC622 5360 bytes
SHA-256: c2124173ad9e2e63b845e934b8f649f3a63a7cf63c9781f7a11154b8511a9217
font_01_sfnt_off0000d7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F3 11080 bytes
SHA-256: 840f94ea214796e4af8181c2b54cf3e4ddda28343b80d518617c0f6719289765
font_02_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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