Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b1efe18b3f0a2b…

MALICIOUS

PDF

75.2 KB Created: 2021-03-09 21:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ebcb5c020406ccce27a9dc0dc4083c51 SHA-1: 27c27eb0162c5df96ce9c6dcde04cb135d197104 SHA-256: 74b1efe18b3f0a2bbdadedc5062d97eb7b454460f6af2973bbe440050591d0bb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, including one pointing to 'druttle.ru/strik', suggests a link farm or phishing attempt. The document body, though heavily obfuscated, contains references to drivers and application versions, reinforcing the lure of a driver download page. The primary attack pattern involves directing users to malicious external sites.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/strik?utm_term=asus+p6x58d+premium+drivers PDF link annotation
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/pawag-mozupepujopedu.pdfIn PDF document text
    • https://bavifevip.weebly.com/uploads/1/3/6/0/136049805/waletarin-fijuditexiga-gelofijunakano-defezufe.pdfIn PDF document text
    • https://fitovixuzo.weebly.com/uploads/1/3/1/3/131380078/9827826.pdfIn PDF document text
    • http://fofafik.iblogger.org/tipos_de_graficos_en_excel_2007.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/apbie._cgg._gov._in_2018_migration_certificate.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_e9b78832f6634b3a9c54de666c2606c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jawusawar/tedotumumepet.pdfIn PDF document text
    • http://gonuwufif.epizy.com/kabaddi_score_sheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/titezigujuxudirujikiride.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/sawagarilep.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/60289458713.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/avicularia_minatrix_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/what_parliamentary_form_of_government.pdfIn PDF document text
    • http://siwufevukopi.epizy.com/is_einstein_bagels_healthy.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_428cdc2a1eef44ca9290921c78abb4fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/kepuxapovolizopifoma.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/38837737679.pdfIn PDF document text
    • http://jepisaf.epizy.com/29231170747.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_off0000e89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 5452 bytes
SHA-256: 76c0351bf0c8a6a8460e0518bead160bfd197d2f90fd91d30364da8014236b55
font_01_sfnt_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 11184 bytes
SHA-256: ae571952755353cadfc2615ecda86535f9b1ced425edc7dc3c068fe7b9001592

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