Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2076242febf89d…

MALICIOUS

PDF

74.6 KB Created: 2021-03-30 05:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c9615d30286efaf11f6d93fd712c20a4 SHA-1: ae53b5d17da230163c231086633dd9e87e6d6f58 SHA-256: 2f2076242febf89dbbebb35429617dad9a6f82a65ff8b2adb33776bdff4b973c
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URLs point towards a spearphishing attachment attack.

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://botokaw.ru/123?utm_term=games+like+archero+android PDF link annotation
    • https://tunawirivam.weebly.com/uploads/1/3/1/4/131437064/2806635.pdfIn PDF document text
    • https://xusumenebob.weebly.com/uploads/1/3/4/4/134478057/3606506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_603ccce903016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_6016b5179b64e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_600d7e4da3480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_603956a460db8.pdfIn PDF document text
    • https://mofafodoler.weebly.com/uploads/1/3/0/8/130874416/4195809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_603ce09ca17b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_60166f952966b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_b8e40d153bf844988743357b58647ee4.pdf?index=trueIn PDF document text
    • https://acda325f-ee3b-40e4-882f-fabc489a6840.filesusr.com/ugd/23b3d3_ff9d5553a44742e19c4cf933be94851c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/vanguard_ftse_250_ucits_etf_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/bethel_music_victory_is_yours.pdfIn PDF document text
    • https://a3c73713-be4b-4c8d-a01f-dab92ecb4e1a.filesusr.com/ugd/5df860_0c8d5b7b78ad4ccda03f3cbb36e569ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/wbcs_optional_anthropology_notes.pdfIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_1f8b3a6a5c8d4442a7d84a980296548b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/earth_charter_indiana_jim_poyser.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_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 5272 bytes
SHA-256: 226573f11105a37cc49de2b0706d377cc327f00cbbd8e6349f0fef9c6ef189da
font_01_sfnt_off0000fa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA32 10404 bytes
SHA-256: 5c9bcd065a32ce0446487f266bd7aa6e8c8cc52a906808d7e812e45e12906031

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