Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b055da1a61004d…

MALICIOUS

PDF

76.1 KB Created: 2020-12-17 01:09:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 29bb840f6ab82ad2a28a49c38a70eb83 SHA-1: 12f9d9061da32984e79578d276bcae56fa5ddd85 SHA-256: 03b055da1a61004d8afeac5208409c966da9a78365bc6a28beee6bee3a5aa771
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to drive traffic to potentially harmful websites. No scripts were extracted, but the presence of numerous links implies an attempt to lure users to external, untrusted resources.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/123?utm_term=crime+scene+analysis+worksheet In PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/vifozowo.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/tiwipipatejitapawuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc571e9abaecd331840d47e/t/5fd22b30b1f6926771608cbe/1607609136993/fabfitfun_fall_2020_dates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce07624-d658-4e5c-93dc-20202a9470e3/sony_str-dh500_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b608fc02-0579-44a0-b862-42f0b65a1f9a/vuvuladuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d077509-f158-43ff-8017-4399425a4b9b/yogi_bear_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a8ca35-6e22-461a-9619-d9aa59bc53aa/33306090969.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/business_strategy_development_application_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91392875-4bd5-43b9-8de1-fc68b9f5fbcc/vefel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a0db07-a9a8-4b1b-ae9e-d3b0001e21b3/30665397365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c988cfe-90e4-436d-b9de-06465fa38ee9/bufatofimobuvejejipa.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/motivational_wrestling_quotes_cut_outs.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_off0000ed18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED18 5200 bytes
SHA-256: 10664c803a9a1a029712222943b4201b068f805179d768d490c3b7845109a77a
font_01_sfnt_off0000feaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAF 10896 bytes
SHA-256: ee2a52f58cfa373447bd049a2aa12201a48b969d2833d6482e35469c3a8408d3

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