Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd3b037f90fbf1a…

MALICIOUS

PDF

83.3 KB Created: 2021-06-07 10:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: efd9ff5f9c2722167a349dda9d46fb01 SHA-1: 907f6d8f42f362f74e2831127c13abe051f5bf3a SHA-256: 0bd3b037f90fbf1a32963f495b246abde6d98037da5bafdfca08ed03632c9f74
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a page offering a Windows activation tool, a common lure for phishing and malware distribution. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of the URL and the high confidence threat detection indicate a malicious intent to trick users into downloading further malware.

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://huntic.ru/pbw?utm_term=ativador+windows+8.1+pro+64+bits+permanente PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460228/normal_601ab7071f349.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448986/normal_5fc82d5db7c3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415946/normal_5ff40e1eab59f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_6017dbaa2c529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_5fe833f2b4055.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4490547/normal_60b4b9e4dbcac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_60368a030c60d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4494440/normal_60afe67f2c26b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_5fe9f02e27ee0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486534/normal_5ffdbdea65803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_60b8aefa93369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_601cee7ee883f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_6032af38cd0ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_605647699b0e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479212/normal_5fe1c6a486f8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5fcb3a05e69ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lifuzopa.pbworks.com/w/file/fetch/144751920/56699458555.pdfIn PDF document text
    • http://pefumugat.pbworks.com/w/file/fetch/144595734/xazinasokapap.pdfIn PDF document text
    • http://jasiduvegulu.pbworks.com/f/43494285104.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B9 5876 bytes
SHA-256: d4ef02f35bce6412ae077e358125473fc501b6b6bc3d02ae0899c5b1cd5881ff
font_01_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 15400 bytes
SHA-256: ab891bea8311ee4ce33a2270f6fe712a426dd50b57de9b516f2695e4d67ccdb0
font_02_sfnt_off000126c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C3 16584 bytes
SHA-256: 476baaeb7c6022c0cdd40bb0a57baa7ce2ef1980d17cf7839c2fd9fe3102a285

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