Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb44a69b8526ef4…

MALICIOUS

PDF

79.2 KB Created: 2021-05-18 08:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8b27e7d0cb07761b6ecaf686910a25b0 SHA-1: d00c86f27d3bfe78d27bca2001a145afaea92882 SHA-256: beb44a69b8526ef44a7b9c573e9bee3d49ec7f414e9e0df2c6b7aabaf8d190a2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, directing users to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

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://bologen.ru/strik?utm_term=potato+experiment+osmosis+results PDF link annotation
    • http://gikepefizera.22web.org/remittance_advice_template_myob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366637/normal_5ffae35763b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_60506580d534d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_6060e3a08f373.pdfIn PDF document text
    • http://wiwomadexuza.22web.org/panasonic_viera_42_led_smart_tv_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_5fe9eaa04c158.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/xaziw.pdfIn PDF document text
    • http://fekepoloper.rf.gd/adjectives_exercises_advanced.pdfIn PDF document text
    • http://gurimexuma.epizy.com/amway_products_price_list_2020.pdfIn PDF document text
    • http://lepuxateg.epizy.com/11241530963.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/63094976787.pdfIn PDF document text
    • http://gevuwomomot.epizy.com/spreadsheet_package_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/25982185830.pdfIn PDF document text
    • http://vonanovab.epizy.com/bemulisu.pdfIn PDF document text
    • http://repazof.rf.gd/download_adobe_reader_exe.pdfIn PDF document text
    • http://donarup.rf.gd/18056818952.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/all_website_video_er_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/appraisal_form_216_operating_income_statement.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_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 5032 bytes
SHA-256: ff3e878e1cbec563cc36d1722dfbace3531f2603abb3051cf527e2470abc7f79
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 14360 bytes
SHA-256: 1af3c14c9fd45ee1be0893fdde6d4caa865793370fd258f84467c42a155c1492

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