Malicious PDF — malware analysis report

Static analysis result for SHA-256 d078ac0805336955…

MALICIOUS

PDF

67.0 KB Created: 2021-03-09 05:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 027fa4f82689abc208c9764297ea87b3 SHA-1: 0a2ed21d3461e98457b3fa4274fb6bb3015432c9 SHA-256: d078ac08053369559b5c7992ea1c89e7e59c1529fa54da76a80403384c94d2a9
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to educational worksheets, which is a common tactic for phishing or malware delivery via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=comparative+superlative+adjectives+worksheet+pdf PDF link annotation
    • http://front-glass.space/diworivipojanusuguqjwv3.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/44c9e8b28e701d.pdfIn PDF document text
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/jezip.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/freelance_graphic_design_price_list_in_india.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/kefutaxizajuku_nodudin_guvosunulibuma.pdfIn PDF document text
    • http://1xbet-football.fun/sobobikazizoninixigewi0rtu9.pdfIn PDF document text
    • http://secureappeal.com/google_search_by_photo_iphoneqfu7z.pdfIn PDF document text
    • http://opt05.ru/vokegemitutofopuvpe8p0.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/58048453952.pdfIn PDF document text
    • https://vivuguduwidu.weebly.com/uploads/1/3/2/6/132681484/7c8bc2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417037/normal_60041adb5d8ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fe55106626ec.pdfIn PDF document text
    • http://retys.space/how_to_get_the_volume_of_a_cuboid2uxsu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5fc9df540e62a.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/logisodewox.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/blues_guitar_unleashed_review.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/nonipesikiri/grammar_and_punctuation_correction_worksheets.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/does_dunkin_doughnuts_have_decaf_coffee.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/dusofobejipowibexugefoja.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/diploma_applied_science_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/saselowalin.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/sccm_icu_admission_guidelines.pdfIn PDF document text
    • http://medazupu.onlinewebshop.net/tefivudagijo.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_off0000c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 5592 bytes
SHA-256: 86c64f823d5908f9f2fcc040870b46ccf5736406a39095d0ed2c7431869f2095
font_01_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 10084 bytes
SHA-256: b24f789c7747eb853750c7442ef4b371a94ba0fc1e6cb559d98f1ba0f0727875

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