Malicious PDF — malware analysis report

Static analysis result for SHA-256 3944ec388056ecd8…

MALICIOUS

PDF

78.5 KB Created: 2021-02-23 10:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b1882ec11e60ea95cf34f425f94ba0c5 SHA-1: dd3469f4ec90c9300254507f34f424d8efb8b9ef SHA-256: 3944ec388056ecd863d6eda83e3158a5dc3df4f8940e470fc59dc06edff3f70a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'control solution'. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing attack.

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://bologen.ru/strik?utm_term=walmart+relion+prime+control+solution PDF link annotation
    • http://sollabs.xyz/langston_hughes_poem_dreams_analysisgybs3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406482/normal_5fcc9f0ce434a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373986/normal_5fc71f09a5714.pdfIn PDF document text
    • http://yellownatural.space/what_is_a_rehabilitation_care_facilitywm4hf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5fc903ddb3b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_6030571b6c336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464072/normal_5fee945d4e561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_6015d810d73f5.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/wuzalugiseto/9068773361.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/dunenasefobesezotukubivaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/razarabudavogo.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/aol_mail_update.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/45094816928.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/zegewoxeko.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/aporofobia_adela_cortina.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_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 5092 bytes
SHA-256: 6433d5343c7ba23d3d82de7de8c6bcfed9c985f06b838188e6c78dc87c1763fd
font_01_sfnt_off000106ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CE 11084 bytes
SHA-256: d8a4a542d9a57a4aa6b8ddaf79e99ad14ed24493626d3f71aa6e51f324c1b77b

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