Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ed6e1bb5cc889e…

MALICIOUS

PDF

65.9 KB Created: 2021-01-01 20:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c0ba49f6e429533bc77b0a3d969d2722 SHA-1: 2c9ecc5cc736f303886a72c93da14729c7db5f4d SHA-256: 79ed6e1bb5cc889e5a4515a244105b23a238305437771dda7548c19e78220aa1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure the user to a malicious site, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/strik?utm_term=the+offroad+company+nebraska In PDF document text
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/renowolebigu.pdfIn PDF document text
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/827b19735200.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/thfdjjZ/rotudapapunekununi.pdfIn PDF document text
    • https://wowifowukanu.weebly.com/uploads/1/3/4/6/134634936/7933927.pdfIn PDF document text
    • https://mokasinerosun.weebly.com/uploads/1/3/2/6/132682676/6ad228.pdfIn PDF document text
    • https://cdn.sqhk.co/mevojazix/tuicmha/24809072402.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/3690011.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/YJmjboa/55746174057.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/1118ad26-5da5-4525-baef-49c7f875543b/najokezizikofinudirojujel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fa0960-d256-4bf9-9eb0-ed61721ce27d/calculation_of_drug_dosages_10th_edition.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_off0000c345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC345 5620 bytes
SHA-256: 2f2c563fe19cdcded7b5e3331019266cf4430ab92f269b1a41371600155d4d70
font_01_sfnt_off0000d634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD634 10892 bytes
SHA-256: ecd8414c65b70bd54ba118d2fa44e25ed2e3ed8e8ccf2672ca46b88ca9ed8489