Malicious PDF — malware analysis report

Static analysis result for SHA-256 452b150d260cfe92…

MALICIOUS

PDF

71.7 KB Created: 2021-02-11 23:09:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cb8e14e9026578fcce59c7a2ddd8e0fb SHA-1: 197fb7fbd51d4ff31b44f923487433ae1378a28d SHA-256: 452b150d260cfe920b382f85fd18398e41bf280dfeabb2750878af3279240624
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to a school supply list, which is a common tactic for phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL, https://druttle.ru/wix?keyword=bethel-tate+school+supply+list, likely serves as a redirect to a malicious payload or phishing page.

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
  • 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://druttle.ru/wix?keyword=bethel-tate+school+supply+list PDF link annotation
    • http://matteset-spon.space/chunky_heel_platform_outfitgkspz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446512/normal_6005ec6a52e5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374198/normal_5ffbed543def9.pdfIn PDF document text
    • http://oyuncuxx.com/vadejepobovogifenelphyo.pdfIn PDF document text
    • http://italywow.pro/farmer_s_almanac_2019_planting_guideevzy6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_602386fdd9edf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455894/normal_5ffb44ea49118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499635/normal_5fd8b4b3c125f.pdfIn PDF document text
    • http://guwobedegaf.22web.org/divisibility_rule_of_11_worksheets.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/zemunomipazikez/janet_holmes_sociolinguistics.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/nowoxudususotexo.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/osteoporosis_guidelines_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/free_printable_alphabet_formation_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/38497773488.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_off0000dc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6F 5108 bytes
SHA-256: c5ecc878b4439ed619820eabe908993511883817da02ffa5c19b135a0c9cb715
font_01_sfnt_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 10664 bytes
SHA-256: c0940f02a57abefc5f8911bbc25fa6e9869a14eb22eeb5f223720022ae581d06