Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c845552ef1e91e0…

MALICIOUS

PDF

69.5 KB Created: 2021-02-03 22:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 02efb57ce9aebd2804b90028343539c4 SHA-1: 191a9ad595f0979362b14173ffa6e5950b43fd32 SHA-256: 6c845552ef1e91e0ff63f8d1af62aab880be1403226d7f1f3a7d51cbf343e837
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://seumenha.ru/wb?keyword=star%20wars%20battlefront%202%20ps4%20%20size PDF link annotation
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/8a948fc44d59f1.pdfIn PDF document text
    • http://goodnaturak.space/84125297226nk76y.pdfIn PDF document text
    • http://zazubabifuwor.iblogger.org/wibibexevepuxebapo.pdfIn PDF document text
    • https://verigidiloje.weebly.com/uploads/1/3/0/8/130874422/jiwado.pdfIn PDF document text
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/9941037.pdfIn PDF document text
    • http://shtangye.xyz/kaxiboroguwonuwirilof6k36.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/buwomonejebelig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://putotapuzavip.rf.gd/vogoj.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/appassionata_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/hockey_calgary_score_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/first_rank_raju_film_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/air_cooled_condenser_working_principle.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/ajinkyatara_fort_kolhapur_information.pdfIn PDF document text
    • http://pusolegulijased.rf.gd/divali.pdfIn PDF document text
    • http://latowetutut.epizy.com/two_variable_linear_equations_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/christopher_martin_cheaters_prayer_free.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_off0000d077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD077 5500 bytes
SHA-256: 10eb729d39e1cc2be536bdf5b7532b3f52be8e1718229f270ccea6be164bd282
font_01_sfnt_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 10372 bytes
SHA-256: 038e988d3e4852b969c63d0b0d38b427d54853591e2a540378bc78afaeb70192

Open this report in the interactive analyzer, or submit your own file for analysis.