Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc9969fd05ca763…

MALICIOUS

PDF

79.3 KB Created: 2021-06-02 05:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0f9209de5f4a5c5abac8b9ad3cd39b3c SHA-1: e08305e67b0a8b27d3b9d240e4e94293f4087e11 SHA-256: 6bc9969fd05ca763dc9ea047596f0940ca43ca7a58f4713b2dc02d0effc1e175
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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=american+gods+season+3+episode+2+ending+song PDF link annotation
    • https://xalonekeroritaw.weebly.com/uploads/1/3/5/3/135329664/423f50027a6f362.pdfIn PDF document text
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/zebagovutonogak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474752/normal_60415adc4ab75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454977/normal_60668e44c5c3f.pdfIn PDF document text
    • https://lobumemimakagom.weebly.com/uploads/1/3/3/9/133999871/c2dd0b6dd.pdfIn PDF document text
    • https://duzejuwilana.weebly.com/uploads/1/3/4/8/134879611/nodedofiri.pdfIn PDF document text
    • https://juxilejaguzu.weebly.com/uploads/1/3/4/4/134404551/86b440016fc761.pdfIn PDF document text
    • https://bebejumupetokox.weebly.com/uploads/1/3/4/5/134513190/lozegepatoxuwazazili.pdfIn PDF document text
    • https://rejifiri.weebly.com/uploads/1/3/1/3/131380436/buwimod-buxuzejef-tatuvexamegij.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/d85271bf-a86d-497c-99c3-41f2fe31542c/how_is_class_d_airspace_depicted_on_a_sectional_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4ee732-b37e-489d-b365-6e4145c73985/tenuvemurijijorusefasi.pdfIn PDF document text
    • http://noxixap.pbworks.com/f/90649003688.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144485400/covid_cause_vertigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0132ba04-db1f-48e0-bd64-71fe46f730ec/dukelubabope.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144412482/swift_reloading_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b5cc24-048b-4474-91f8-5c0409888ff3/28561645434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/268673eb-fedf-48e6-b1eb-5a9f8edc9015/51950916427.pdfIn PDF document text
    • http://fevawigo.pbworks.com/f/winabin.pdfIn PDF document text
    • http://kepojijudiva.pbworks.com/w/file/fetch/144490212/nonazifa.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_off0000f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 5648 bytes
SHA-256: 3feb62a51a637b293ab2e6e5495e79157ff9b85d2b3f4f1ca47eb231d20c93d0
font_01_sfnt_off0001085b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 10968 bytes
SHA-256: 3a49c4e1fc09c0eb74500d3c900f6dd840297adb2a7e4a349cd7008beebd2eb6

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