Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d0c5e15e21a7f5…

MALICIOUS

PDF

71.8 KB Created: 2020-11-09 17:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0d6aaa1c83611b785f996cff73ab013a SHA-1: 85955d72206d8d27db39945a5e603769801c6aa9 SHA-256: 33d0c5e15e21a7f5db62ef4cd137c099894b27b14ae5ba9332e8af636aade424
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL, 'https://trafftec.ru/aws?keyword=hawkins+preschool+vicksburg+ms', which is the primary indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated and contains no readable text, preventing a more detailed analysis of its specific lure.

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://trafftec.ru/aws?keyword=hawkins+preschool+vicksburg+ms PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5f8ff63320f74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8717ccdb368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5f9ac352227c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_5f9acb113aff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8c164121ced.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
    • https://uploads.strikinglycdn.com/files/0c331455-7b83-4664-8dac-baed6578e59d/97353612445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e46043c-0e7d-4872-8b4f-cd248792863b/nissan_connect_sd_card_update_downlo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e32613e-6d30-4906-b8cd-e689bc7ea70e/16639650058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d71ff88-6d45-4625-96e3-3ab9910297ea/black_lantern_oath.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09561bd2-a8f6-45af-8d23-bfe595e12141/full_cast_of_legend_of_korra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a948cbf9-0013-4d56-acdf-176b8cf976c4/patizilenafuwobevanopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecef54f6-fe6a-4641-825f-4b0a3f683a83/se_dconnecter_de_outlook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605be06d-0032-4f96-ba77-91483edb4b2c/xadilarivow.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_off0000caa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA5 5464 bytes
SHA-256: e5425d16fdc83b043385742a6a526008447a82990d7c403e6c042dfb8d981a5b
font_01_sfnt_off0000dd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD13 11712 bytes
SHA-256: 3198a444a66688817e4ad8e8159f5239b10143631f03eabfd4d6c5540bd370e8
font_02_sfnt_off000103ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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