Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df69d92be876fbd…

MALICIOUS

PDF

77.9 KB Created: 2021-04-17 06:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3286be368666e8a4aa0aabcac62105d0 SHA-1: d962029ea7f657837bcabc303ad9a9461a11f23d SHA-256: 3df69d92be876fbd24719a2187be1cd082b4f8b7457e33ef4459e4c7a8e680f8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=cyberpower+ups+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369783/normal_60506f0c06c64.pdfIn PDF document text
    • http://dream-stat.ru/nipijos9z2z3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368243/normal_5fed37b4538fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5fe778b3dbd6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471692/normal_5ff988ac94472.pdfIn PDF document text
    • http://antonio-ita.space/duremajazowopapinii8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484093/normal_5ff29df398b68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_6069e50b09836.pdfIn PDF document text
    • http://shoes-storie.club/22769128266xi76p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://617ecdd3-9f15-4ef5-8539-b0e2931b4c86.filesusr.com/ugd/55f640_42ee90d4b27f42528e737b53d3c74e7d.pdf?index=trueIn PDF document text
    • http://tafikepuvanotu.epizy.com/mubageweforiboselawoku.pdfIn PDF document text
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_c699ef655f2748d89b1271f8bff3695e.pdf?index=trueIn PDF document text
    • http://jisexapegumet.rf.gd/nupunininerodowusege.pdfIn PDF document text
    • http://juxonarevat.rf.gd/deep_breathing_guided_meditation_script.pdfIn PDF document text
    • http://vivizegijarugip.epizy.com/160259288.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_e0fd8e4c63a946cb806dd8076f5f7b89.pdf?index=trueIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_794407244b2a4d3f9670c64b787a37fa.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_e55265e262bb40a2a51af1b9281747da.pdf?index=trueIn PDF document text
    • http://banugigo.epizy.com/kaffir_boy_study_guide_questions.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_ac909608db9a435dade95e5303a90868.pdf?index=trueIn 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_off0000f2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A3 4924 bytes
SHA-256: 9f943b89b9b4ba123cf2c11f934c508603285689377d4db2b4dbe49377d6c383
font_01_sfnt_off0001038a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 11036 bytes
SHA-256: 5a44b82ed4847563c97a32a76f01899576eda3e90a67bd0c9845f152757fca03

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