Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f323a70bbffe5f…

MALICIOUS

PDF

79.1 KB Created: 2021-02-27 22:33:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 21425f86c00411fad14b9fac59d9a391 SHA-1: 243236a68a30a5b35fe42207ee70bc4b3b8bcfa3 SHA-256: d7f323a70bbffe5fbfd8bd616143cfd31177131bdd3f2ca6e21c4f7eb23c3257
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

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://kuzutuzo.ru/wix?keyword=facultad+de+psicologia+mar+del+plata PDF link annotation
    • http://baderezu.scienceontheweb.net/the_vegetarian_butcher_stock.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/digowitapokajopexyglh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392441/normal_5ffcacc31fa8d.pdfIn PDF document text
    • http://madewithsunshine.com/21807396416gmbtj.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/how_to_count_to_100_in_spanish_by_tens.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fc5d81b41491.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/canon_speedlite_430ex_iii-rt.pdfIn PDF document text
    • http://get3creditscores.info/guided_reading_resources_ks2hooyq.pdfIn PDF document text
    • http://falopeliti.22web.org/94593221267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473654/normal_600968a8f3dbd.pdfIn PDF document text
    • http://repair-telefonov.ru/the_ordinary_skincare_guide_for_combination_skinsxeez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_60268d1772bd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5fcd4001f0f38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowosos.myartsonline.com/where_is_the_calculator_on_chromebook.pdfIn PDF document text
    • http://bidavotajowev.epizy.com/29815597482.pdfIn PDF document text
    • http://daxepusiz.rf.gd/medical_embryology_practice_questions.pdfIn PDF document text
    • http://vumesurev.epizy.com/bijiketu.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_off0000f624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF624 5348 bytes
SHA-256: bd168cd8207b1cf856d4994d8749d0d0b6cc738f3be28633277b59c8ef451316
font_01_sfnt_off0001083e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083E 11304 bytes
SHA-256: 07f0dd147bd3627f8692f46a8253ea7a6678eb58cec2a3dc51a2a026e14ecaab

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