Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0e185b54c68228…

MALICIOUS

PDF

72.4 KB Created: 2021-03-22 04:19:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 09a90dad17a8952aeeed2320b3eb2246 SHA-1: f2c87d64cde42a223eec329c1afbc7c22ad834f2 SHA-256: ca0e185b54c68228a66da45bc6e5a8c077dd88f1fd9c5c95636903f1d1ce2013
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links pointing to disposable domains and known malicious redirectors, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection further support its malicious nature. The embedded links are designed to trick users into visiting potentially harmful sites, likely for phishing or to download further malware.

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
  • 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://dafemum.ru/123?utm_term=today+chennai+weather+report+satellite+map In PDF document text
    • http://kupivse.xyz/how_to_use_protein_shake_cupr207x.pdfIn PDF document text
    • http://usesoda.pro/230766004677yxx0.pdfIn PDF document text
    • http://load-bcp.com/451581754762p4uf.pdfIn PDF document text
    • http://sendgrid-de.com/4476297105zelwr.pdfIn PDF document text
    • https://miboxijudowisu.weebly.com/uploads/1/3/4/4/134491333/jakixasige.pdfIn PDF document text
    • https://jitugexe.weebly.com/uploads/1/3/0/9/130969989/javedoxagokewurifo.pdfIn PDF document text
    • https://wigowuwadapol.weebly.com/uploads/1/3/5/3/135315864/df9aebd.pdfIn PDF document text
    • http://reduslimer.website/how_bitcoin_works_pptlsane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_602b05245a9c1.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/foxedebuxikuvelimage.pdfIn PDF document text
    • http://tevituvodejifep.mywebcommunity.org/mugipix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_6028e91674cf0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_c74f3ecfbc4941a7a19b360374565d21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ebb81a-c954-495d-8dc4-afd4e6a55506/rifurul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9b8dfb-18d5-4b4f-8b24-e13cc61e8021/how_to_tie_a_wooden_rope_swing.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/a_raisin_in_the_sun_movie_1961_cast.pdfIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_52162b30362843beb369946b06e75547.pdf?index=trueIn PDF document text
    • http://saxodanokijaj.atwebpages.com/24712777263.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_off0000dc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC59 5456 bytes
SHA-256: 84325037a5c3ce07691e6877662ee427bd9116b4195316eb789f4d60534de463
font_01_sfnt_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 10536 bytes
SHA-256: e026047a2f4ed228a02995516ad4f929b1c5f5ecc0f1bacd64e2c47c66e083c5

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