Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d90a1a21415d4c…

MALICIOUS

PDF

71.3 KB Created: 2021-02-22 19:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4f119597c017f8923cd61ae06f75925d SHA-1: ef85fcd06c5e442487bac8b2c3863e23b4c23d9d SHA-256: d0d90a1a21415d4ccf5ee640d01eaf7619710743873d3a4f20969a18166250b8
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ML_NYX_PDF_MALICIOUS classification. The embedded URL is presented as a search query for connecting a Pebble watch to Android, likely a lure to entice users to click. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wb?keyword=how%20to%20connect%20pebble%20watch%20to%20android In PDF document text
    • http://endi-itali.space/62806295859vwd43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459624/normal_5fcdd44491371.pdfIn PDF document text
    • http://cashbackmoney.info/949841428539qpph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414153/normal_601911006c64a.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/reformed_theological_seminary_online_lecturesagj9q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369162/normal_5fdf5433d990d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fefc2431a2ae.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/hjfpnTB/devizes.pdfIn PDF document text
    • https://cdn.sqhk.co/wafifovuwel/c6mQw5F/29071552739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_602696db108e6.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/kuxuxemu/90811634096.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/how_much_should_a_24_month_old_say.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/character_sheet_template.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_off0000da4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4D 5176 bytes
SHA-256: c59fd76b5b49559512267112281614d25650e645d888c00b33e3a63b40329493
font_01_sfnt_off0000ebe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE6 10660 bytes
SHA-256: d3e9ec2d898fe7d53c1de5d082534d0e95da65034866ca2fd5d153bee279911c

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