Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b5ccd0192e47ba…

MALICIOUS

PDF

83.3 KB Created: 2021-05-22 22:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f6de37cb01db9571c7a25ca08177438a SHA-1: 7058f3bfbc0c1d4985818ff32386f497e9f92e96 SHA-256: 52b5ccd0192e47ba605ef890ebc7676c11305818b5cb14a02541233d3a378210
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being `https://gimoguvi.ru/strik?utm_term=efecto+mariposa+pelicula+online+latino`, which is likely a lure for phishing or malware delivery. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` further suggests a malicious infrastructure designed to redirect users. No scripts were extracted, but the overall structure and URL usage point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://gimoguvi.ru/strik?utm_term=efecto+mariposa+pelicula+online+latino PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387031/normal_5fe5e559bb114.pdfIn PDF document text
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/ba85f868465dc.pdfIn PDF document text
    • https://pimetukuke.weebly.com/uploads/1/3/4/0/134017259/danuxuwanofax.pdfIn PDF document text
    • https://jugunita.weebly.com/uploads/1/3/4/4/134440710/3269275.pdfIn PDF document text
    • https://ridimejaxokixis.weebly.com/uploads/1/3/5/3/135340331/buxepiluzubutor.pdfIn PDF document text
    • https://dikijezirepa.weebly.com/uploads/1/3/2/8/132815872/nivelagurit_satenalelul_sugonofivodega.pdfIn PDF document text
    • https://gixobuwek.weebly.com/uploads/1/3/2/8/132815317/571937fca5f77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5fded679afb02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386074/normal_6002a2b9a797e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_6049375dbe97f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500199/normal_602d6a9a89446.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/pibivarar_fefupigefepor.pdfIn PDF document text
    • https://geselumagema.weebly.com/uploads/1/3/4/6/134695037/992dd3fdf0380.pdfIn PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/9808872.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/gixirojozogufux/tetinasilitukaki.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/57415010485.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/brain_teasers_funny_riddles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/jokifomemax.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 5120 bytes
SHA-256: 72155fdc7a194b3a2c1c58647df942ec5679b27c4a38dfd581efc0a97c84cba1
font_01_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 2080 bytes
SHA-256: 041fb338776cc2c4fdf02ef8dc738f2ca586166e2fdd6942bea705876f8091c4
font_02_sfnt_off000104b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B3 11244 bytes
SHA-256: 92c0963eb46318c5f3b52a20c845073d2e6db55804c6c384b60ce159b27d1698
font_03_sfnt_off00012937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12937 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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