Malicious PDF — malware analysis report

Static analysis result for SHA-256 b041eeb9c776854c…

MALICIOUS

PDF

70.7 KB Created: 2021-06-08 01:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2c14f294d3e5bb9b719b961b6cea20e2 SHA-1: 4a5f19908b8f9f0a9ccb3db35cbd475c62a796a7 SHA-256: b041eeb9c776854c2c0c5a4362b96d59b0341739a5430341ccabe5403ad225e4
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1534 Steal or Modify Data

The PDF document contains numerous embedded URLs, many of which point to link farms or disposable hosting, suggesting a phishing or credential harvesting attempt. The heuristic 'SE_MFA_LURE' specifically indicates that the document is designed to trick users into providing sensitive information like one-time codes or MFA approvals. While no scripts were extracted, the presence of many external links and the MFA lure strongly suggest an attempt to steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://archism.ru/pbw?utm_term=how+to+fill+anganwadi+form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6025c27bb3990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_603a209e4c478.pdfIn PDF document text
    • https://tixafaxul.weebly.com/uploads/1/3/4/3/134311963/f3ed514102fb5c3.pdfIn PDF document text
    • https://lilepixot.weebly.com/uploads/1/3/4/4/134462463/namikaxaduwedigotod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_6032825419fe4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423454/normal_6007fa4659fad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_601887c6aabd9.pdfIn PDF document text
    • https://pobanuritixejun.weebly.com/uploads/1/3/4/6/134601578/0c27f6.pdfIn PDF document text
    • https://rijifupipi.weebly.com/uploads/1/3/1/4/131453414/e143fb66.pdfIn PDF document text
    • https://juzopuxenepin.weebly.com/uploads/1/3/5/3/135383483/39900b2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedetuwi.pbworks.com/f/pijalego.pdfIn PDF document text
    • http://wezenibafasi.pbworks.com/f/typeerror_window.jquery....telerik_reportviewer_is_not_a_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486ffa0c-e96e-4b5f-abc8-e9d490916a0e/67321895245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cec7eec-5891-497d-bf32-2a72b37597d2/what_is_the_best_stihl_chainsaw_for_home_use.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/vanikopabazebaxaruxeg.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144516639/what_setting_for_broadcast_spreader.pdfIn PDF document text
    • http://wufamazajo.pbworks.com/w/file/fetch/144448425/welitogisirogo.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/f/39386394421.pdfIn PDF document text
    • http://xibosini.pbworks.com/w/file/fetch/144738129/zotorubakapogiparatevas.pdfIn PDF document text
    • http://neruwuk.pbworks.com/f/15694432467.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_off0000da0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0F 5104 bytes
SHA-256: 9fcfed8f8eb092684c4e668ae604d35f773d11b328317b0743e43e4b2a86722c
font_01_sfnt_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 9880 bytes
SHA-256: ea1ea1dacd1399374b81df2e12bba472d3b34525cf981650235bda0017d6b3cd

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