Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37206e0ed6d107b…

MALICIOUS

PDF

85.3 KB Created: 2021-04-02 09:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8270db6fdc9ebdc72edd4ba775dedea0 SHA-1: 2ec7608fe60bef413c72d7a8eab356e26980cde8 SHA-256: e37206e0ed6d107b838df274cff0c82d5cf3d6b60a18a2ad5dafd64962246ca3
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a redirector to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=archidoxes+magicae+pdf In PDF document text
    • http://ipatovaalena.ru/87516320915v9cyn.pdfIn PDF document text
    • http://arfeshome.com/54591205630qxtmg.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/sensory_system_physiology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_603e6298b9f34.pdfIn PDF document text
    • http://revikusuves.22web.org/fofiwipowibepajulupi.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/biblia_reina_valera_1960.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404490/normal_5ffb7f0892b39.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/30890028873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391335/normal_6026dc2a56e06.pdfIn PDF document text
    • http://rajajime.mypressonline.com/71935351807.pdfIn PDF document text
    • http://sellforce.ru/ladezagejazefeniew5an.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://volajigatume.epizy.com/dotofitikesogekixewanuze.pdfIn PDF document text
    • http://pabixezo.rf.gd/benefits_of_entrepreneurship_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b19355-95e7-4f4e-847a-cbcea338087e/how_is_popular_culture_spread.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/77408756113.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/retinopatia_diabetica_articulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6bd223-bdf2-4a0c-9595-18a96569b575/summer_baby_monitor_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/ismart_shankar_dj_songs_audio.pdfIn PDF document text
    • http://weguxaja.rf.gd/d_d_beyond_homebrew_guide.pdfIn PDF document text
    • http://wetukanezin.atwebpages.com/circular_linked_list_in_c.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/what_is_kakashis_red_eye_called.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_off000109c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 5592 bytes
SHA-256: f673241f19ffca97b26af9363db38118c64f31c8989533482e463d295170e816
font_01_sfnt_off00011ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA0 12628 bytes
SHA-256: f3f62e6c6e219cea71f48402957e9527b3a7b278e94dfd88b98f5be0bac94d29

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