Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1a5dada3565d5e…

MALICIOUS

PDF

69.7 KB Created: 2021-02-23 04:24:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 703e56af557ac788d9f0d12bfd423de9 SHA-1: 9c5e8cc7d36deb22062442d94660cab2daf5ca24 SHA-256: 7a1a5dada3565d5e19df02bb9b79e4b2f060a79cc9998a749950aa572d467c1a
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of numerous suspicious URLs points to a likely attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=winchester+9l60+gun+safe+for+sale PDF link annotation
    • http://good-production18.site/4214721488cjv8q.pdfIn PDF document text
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/jowonepemo.pdfIn PDF document text
    • http://jedufozares.22web.org/securecrt_crack_windows_7.pdfIn PDF document text
    • http://monubaz.iblogger.org/bunnings_acrylic_sheet_splashback.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/hc0sVge/big_shark_movie_trailer.pdfIn PDF document text
    • http://stileidmo.fun/badland_2500_winch_wiring_diagram5g9l1.pdfIn PDF document text
    • http://fupomogusi.22web.org/java_windows_10_x64.pdfIn PDF document text
    • http://creampiepow.club/avast_license_file_2017_free7pzu8.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/R2ggbih/kefatobalejatu.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/zafirawit/makisetozoparo.pdfIn PDF document text
    • http://ximolamerojizud.epizy.com/83039291331.pdfIn PDF document text
    • http://xubudexev.epizy.com/nikurupebexixi.pdfIn PDF document text
    • http://tutakaxebi.epizy.com/65559618117.pdfIn PDF document text
    • http://pijefekogol.rf.gd/46370365513.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_off0000d2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C6 5608 bytes
SHA-256: 45591301771f27ddde45e9ace8ed1e7afb622113cc8fc49c7a958043c897accf
font_01_sfnt_off0000e5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E2 10732 bytes
SHA-256: 281d629d609ad6f615550be8e23afab595af1c9e033c6df81895c0ada5c7a9c5

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