Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a1223fe1d82717…

MALICIOUS

PDF

71.6 KB Created: 2021-03-25 04:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ffc7c6e9e4e12b84d9ede95e74c6b81a SHA-1: ad88297fd5d872899ca8ce7d7dc8910a3661fcd9 SHA-256: 24a1223fe1d82717e2a6b829e0a94afa46d905726192edcc0077a004bc198fa4
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that are flagged as suspicious and potentially malicious by multiple detection engines. The ML classifier and ClamAV both indicate a high likelihood of maliciousness, specifically related to phishing. The document body, though heavily obfuscated, suggests a lure related to 'phrasal verbs exercises PDF', which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=phrasal+verbs+upper+intermediate+exercises+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401732/normal_60212ada804f4.pdfIn PDF document text
    • http://watogoda.mypressonline.com/nurozebudesafuvelareg.pdfIn PDF document text
    • https://tuxibefogeja.weebly.com/uploads/1/3/4/3/134359070/86a95afc1aacde.pdfIn PDF document text
    • https://cdn.sqhk.co/lopokevofoti/fggijjc/sopixi.pdfIn PDF document text
    • http://zujejilolo.scienceontheweb.net/manidutapobuv.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/jubakob_lexalerotopol_wekifozigam.pdfIn PDF document text
    • https://sirubiruxegame.weebly.com/uploads/1/3/4/5/134581195/tuxejuxutawalizuwexe.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/50030822526.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/jDjgjbo/75433755575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_60180704ebed0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506170/normal_5ff24c4892dbd.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/63639244507.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/sonutopexaramuf/application_letter_for_job_vacancy.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/amino_apk_free.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/molonefofasogowoguna.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/bollywood_movies_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/demefiruvemef.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/tifiwonigirotivalakem.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/wobim.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_off0000d9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EE 5664 bytes
SHA-256: 262cb6862769d059638f86e05dd846d6bc9646b80edeceb321d04947509bce1a
font_01_sfnt_off0000ed11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 10604 bytes
SHA-256: 3d742b6e559058e991c779c7ef2aa4964446c58fcc33abacbb56df9a875b6c52

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