Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c6a639217a50ea…

MALICIOUS

PDF

96.5 KB Created: 2021-03-14 09:07:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f961f45d6e58a319479be94f994d3de3 SHA-1: 8b43bb0f55ed116a2d1663ee44afd020964c28b9 SHA-256: d3c6a639217a50ea77cafae8a8a1f91fcdec9af59449b4c2294d9db567c55c52
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable domains, indicative of a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=proyecto+de+grado+pdf+bolivia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402944/normal_601bde0865c3b.pdfIn PDF document text
    • http://buwubaled.mywebcommunity.org/what_is_a_good_quote_about_family.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/12563714679.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463785/normal_5ff088f2d903e.pdfIn PDF document text
    • http://pilinopumewaza.mywebcommunity.org/risc_pipeline_in_computer_architecture.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/refarudamedejox.pdfIn PDF document text
    • http://pinezotamex.getenjoyment.net/receptor_agonista_y_antagonista.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/bates_clinical_examination.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_602c295202054.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/list_of_accredited_tvet_institutions_in_kenya.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/career_path_cooking.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/46376683354.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/79333374180.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5ff374ed22cd2.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/kovibu/bidivavarak.pdfIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_113b6d1a9f4f4b6ba4fa7b736b8ffb0f.pdf?index=trueIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_e0620430dd1c487196c227f1f326abeb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/how_do_you_write_a_good_summary_for_a_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/50734575617.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/troy_bilt_2600_pressure_washer_oil_change.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/jogikadaxijikekosisuzuxur.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_off000137ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AC 5448 bytes
SHA-256: 10cab4e1e19bc61d0381f379e4e8aa46017d61774e6ae60a1d6e4e32ae047c8e
font_01_sfnt_off00014a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A50 12832 bytes
SHA-256: 269076cd226c73eddf2ba779133f68ca4bf031e437b16b98f090382fe73c4d5b

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