Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba38025dc264188…

MALICIOUS

PDF

61.1 KB Created: 2020-12-08 09:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 492a9ffe102d7ecddab343b6701c37ff SHA-1: 183abfc1b1bc8916908c1e07c30cc4038c29199a SHA-256: eba38025dc26418849530e0db588d573efb73fafb1baac37f6970157b0741ff5
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector and a link farm. The embedded URLs, such as 'https://traffine.ru/123?utm_term=disney%2527s+forgotten+princess+shirt', indicate an attempt to direct users to potentially harmful external sites. The document's structure and content suggest it's designed to host a large number of links, likely for malicious purposes like phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://traffine.ru/123?utm_term=disney%2527s+forgotten+princess+shirt In PDF document text
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/wugadulagutuz-lijazijeduga-dopatila-nujuguz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_5fac4c59cbc72.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/sidejeko_daradilet.pdfIn PDF document text
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/4111619.pdfIn PDF document text
    • https://juzomewe.weebly.com/uploads/1/3/4/3/134350864/vinoxinazozadab-naliti-nosukosexis.pdfIn PDF document text
    • https://fubuwadedaxas.weebly.com/uploads/1/3/4/8/134897716/6783163.pdfIn PDF document text
    • https://nokivuvaxeg.weebly.com/uploads/1/3/4/5/134594014/0d2a9.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/5fc5a455085bf90c0e1d6cd6/t/5fcbe66e21c0486e91a2a1c6/1607198318377/mumawibafusulido.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c4440a2757459bef0d45/t/5fcadeda85bc3a28a6fedd1e/1607130843346/2403958280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e189b088-cfc0-4149-9f0c-a113ad1b6a4f/51385956614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf0fd88-56c2-4d11-bd7f-7d9ac3a76f54/nanik.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_off0000acea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACEA 5168 bytes
SHA-256: d8c50f0c1a41ec71f020dcb372375815d6e5e0b35d6d70fcc398db71cd79241b
font_01_sfnt_off0000be9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9E 11760 bytes
SHA-256: 62c01571d80838a0b61a0247040e58d420885ced843a43acefe6a8ac189d16bf

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