Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4f03e88ad00c4f…

MALICIOUS

PDF

71.4 KB Created: 2021-02-18 18:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 65878901fef4a6b88eda4f8a54f7ac7b SHA-1: bd9dac965b3473f6065782353ce1773f475ac170 SHA-256: ba4f03e88ad00c4fcd2fa11e28e00f0d047cc5cc59891e33a1fc4943f5bb564b
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with the latter specifically flagging it as a 'Pdf.Phishing.Trojan'. The presence of an external URI pointing to 'baarspo.ru' and the heuristic 'SE_URGENCY_LURE' suggest a phishing attempt. Although no scripts were explicitly extracted, the PDF format and the nature of the detection indicate potential for embedded malicious JavaScript or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=why+is+my+directv+blinking+connecting PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495849/normal_5ffca58babea3.pdfIn PDF document text
    • https://nazumuliwoj.weebly.com/uploads/1/3/1/3/131383416/nolokazemadoboviru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_60204530a8064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_60152f0252c8f.pdfIn PDF document text
    • https://molavose.weebly.com/uploads/1/3/5/3/135350427/9539922.pdfIn PDF document text
    • https://wesoxuzepa.weebly.com/uploads/1/3/4/3/134372623/ronelo_jojez_jogaxiwufow_jejowu.pdfIn PDF document text
    • http://topijakalez.22web.org/aplikasi_ukulele_tuner_senar_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391921/normal_5ff1788c019ad.pdfIn PDF document text
    • https://timowerudep.weebly.com/uploads/1/3/0/7/130738780/xipezeredi-fifadolopa-wenevumiwewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460045/normal_6015c3393313d.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/100285.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tegofiv.epizy.com/isrs_4400_example_report.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/crossed_ally_condie_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/77721647788.pdfIn PDF document text
    • http://tekunobujolid.epizy.com/filmyzilla_bollywood_2019_all_new_movie.pdfIn PDF document text
    • http://ratesedefavure.epizy.com/berchmans_songs_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/nubadoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/e._coli_coliforms_chromogenic_medium.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_off0000d98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 5524 bytes
SHA-256: e3365a36ecd28188f21b9659b620fb96b2ac40ea6331f9c373b95d859f360c48
font_01_sfnt_off0000ec40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC40 10612 bytes
SHA-256: aa41f134334feeffbc2962951b9a7708c5786beee52f4c76a0e1329f2e1600dd

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