Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a1e8b512833e04…

MALICIOUS

PDF

80.6 KB Created: 2021-02-19 23:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ac71c40e745a7602d61f77ee4c5ff4dd SHA-1: 38cafc3d77368683248d0e0dcc2f572fe5fc5eb7 SHA-256: 50a1e8b512833e046db37ba7a23310ce1de9508534faa957362c3fa011e49ecf
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=kd+tripathi+pharmacology+mcq+book+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484812/normal_6004bb2777b56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470222/normal_5fff45ac94d20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449599/normal_5feea00849ee4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459630/normal_6002ad7a07d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_601280cd7331d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390374/normal_5fcbc1cb2ec67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384825/normal_5ff81229195ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5fcbbdb9cd429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369905/normal_5ffc54056e42b.pdfIn PDF document text
    • http://decideyouself.fun/androides_sonham_com_ovelhas_eltricas_gratisn00f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_60259826be003.pdfIn PDF document text
    • http://sexurinugu.22web.org/asp._net_e-_commerce_templates_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382186/normal_6003f3141c894.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369655/normal_5ff529c135907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471719/normal_5fdd8e946d3b6.pdfIn PDF document text
    • http://graatorama.fun/honda_3000_psi_pressure_washer_replacement_pumpye8u2.pdfIn PDF document text
    • http://sakajutapud.22web.org/6198189809.pdfIn PDF document text
    • http://belldiscount.ru/luxosikazidajoj2byw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443804/normal_5ffcba465c82b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425760/normal_5ff9047433d33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jizofaludem.epizy.com/kuzex.pdfIn PDF document text
    • http://vovokab.rf.gd/pefazigamewapebudezibapi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9D 5556 bytes
SHA-256: 6d5ce8642b3d54cca203951d49a628c4991f75ed66489ba3bc5bcd133a9edd48
font_01_sfnt_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 10416 bytes
SHA-256: 72e02b82d3d1e725485898aed6d7b5ae4e87a5f4ba86a68c3f7f5a763fc5c2fe
font_02_sfnt_off000125ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125ED 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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