Malicious PDF — malware analysis report

Static analysis result for SHA-256 7941ae2abf4299f4…

MALICIOUS

PDF

207.2 KB Created: 2021-05-12 22:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a7d6d34ad9ebba02185a91c3ce201e94 SHA-1: 144f37ff6bc7fe3643be1a522cc4b5acaae35f9d SHA-256: 7941ae2abf4299f40949a8c47629170444d6b46f4fbd6944966b67195eaec9a4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, contains text that appears to be a lure related to "Jorge Luis Borges" and the wkhtmltopdf tool, suggesting a phishing or social engineering attempt to redirect the user to the malicious URL. No scripts were extracted, but the presence of an external URI and high-risk heuristics indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=jorge+luis+borges+obras+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462093/normal_60345f1d8cabf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462037/normal_6035b29731b2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_600d004574fcd.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/ihJgigc/revefor.pdfIn PDF document text
    • http://narawodosure.medianewsonline.com/acta_constitutiva_sat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_6019297c98183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_602b88ff18819.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376869/normal_5ff5b1a09ee8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486041/normal_601b3ec70b8ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_604941368dc28.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/toziwoku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454161/normal_600c386af238a.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/as4gcif/3418345772.pdfIn PDF document text
    • https://cdn.sqhk.co/wagejino/JVYihia/brick_classic_brick_game_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_388d5f5a96b5418cba160edef5f6ed13.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/enzymes_amoeba_sisters_worksheet.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_673dcbf0bfd64b2b8580e9261f2ec56b.pdf?index=trueIn PDF document text
    • https://777dd155-384c-4f1d-a337-8f27b94bb056.filesusr.com/ugd/1ecdae_97e8633d716748a5a330e804d638ef5e.pdf?index=trueIn PDF document text
    • http://wewamamewiler.atwebpages.com/cognitive_biases_codex.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/damage_report_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/susubasilejuxobifuf.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/sewelenanugulumevu.pdfIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_30fa75d5a5c24f90acb5fcc54e6fb1c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benuka/arboles_de_navidad_originales_manualidades_faciles.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEC7 5336 bytes
SHA-256: 5e5ccd9c604f6b7163e8066ee7ae0bb0d679bb012ff6d2b497a4067dc330e4aa
font_01_sfnt_off000300f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F6 15084 bytes
SHA-256: 880abcc429b060d5007fc076c0eb2953d37c99a129f172bd3f67cab62610ad53

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