Malicious PDF — malware analysis report

Static analysis result for SHA-256 993828b73aac2cac…

MALICIOUS

PDF

77.1 KB Created: 2020-12-29 15:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 717e5487533045c867282e0fc6473696 SHA-1: 04496e5dee30104ece290af83cda55470c5923e9 SHA-256: 993828b73aac2cac5547f3ca2917844b7a5e2c43baea2690438e081243a2907c
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/strik?utm_term=friendship+videos+for+whatsapp+status+download+tamil In PDF document text
    • https://pizewenijanud.weebly.com/uploads/1/3/0/7/130775868/gutuje_nusepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5f882fbb39fd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425491/normal_5fe07bbb22fcc.pdfIn PDF document text
    • https://bumenabizobopum.weebly.com/uploads/1/3/4/4/134462968/bigezonomutitakozo.pdfIn PDF document text
    • https://zojujevekuki.weebly.com/uploads/1/3/0/9/130969212/188a3fae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445888/normal_5fa83c128c052.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/ehgjdge/noziwafugugiponatixow.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/c6680a7d-4289-4b2e-8ec5-994b1efac99c/muwileker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b8cd1b-131f-4992-b35e-ee74e7eae5a0/delco_training_center.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdca0797-2e4f-4e04-9670-fb0a19d3193f/pepose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01221195-b68d-43e4-b82b-c3fc40b80974/lexmark_ms315dn_manual.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_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 5388 bytes
SHA-256: 4272ea20e6f7f5db9cbc0b7902fb819fd0f383a0b1c3b8df55e9840ccc536c08
font_01_sfnt_off0001047c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047C 10372 bytes
SHA-256: ec73a19e4466069623573f3242fa9ac71daba0e4232b12606ff0a357d8700873