Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4350cefe9d6dc7b…

MALICIOUS

PDF

84.5 KB Created: 2020-11-17 09:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0b37d6bd600e03527e28ee05a43e7546 SHA-1: 3f1baec6ba3ff5959d9d30977e101dc9546785dd SHA-256: a4350cefe9d6dc7b4097b11c0c32bda6c62d2bc30810c3b7b782dc9532009fb8
214 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, disguised with a lure related to Domino's pizza ingredients. The heuristic firings indicate this PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/123?utm_term=domino%2527s+pizza+ingredients In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f8cfbad9fa05.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/lamuloganon_zugoxulop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393353/normal_5f9627615dd06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fabb1ac9f41a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f890b2b9db4d.pdfIn PDF document text
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/zadirapaj_dunutuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415308/normal_5fb31f8e64799.pdfIn PDF document text
    • https://nokipudejavuf.weebly.com/uploads/1/3/4/4/134486619/nojipigum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5f8cb49d152a3.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/771447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8ba606a86e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f8eb5f00392b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_5fb2f91649158.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df117e9-82db-42cb-ab94-5138ca2f4a2f/mewak.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 5328 bytes
SHA-256: 2483c529592a1b63cc0caab578b91e029fa5a5801627b0e67ced7a1cde386473
font_01_sfnt_off00011477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11477 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off00011fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD7 10764 bytes
SHA-256: e35f709747067679552cac74edeb42d72e0f92abad35042c9437889fa9155782

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