Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61f1df92a31d936…

MALICIOUS

PDF

69.6 KB Created: 2020-12-18 12:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ab9562563521768caf31573cadd9265c SHA-1: e1d6c018d0851076571f079f89beabdf12dbaafe SHA-256: d61f1df92a31d9361eb0eb2a27f041939a3b19cc95e6d7acf30a2c5150867892
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI, https://traffnew.ru/123?utm_term=normal+quantile+plot+jmp, was embedded within the document, suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI point towards a common phishing 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://traffnew.ru/123?utm_term=normal+quantile+plot+jmp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392193/normal_5fdc3b8bbbe84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_5fc0a382f166e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f8b2f2da16a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449395/normal_5fa505432eaa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f87d2b7d06e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472200/normal_5fb366b27932d.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/wavunot/zuzexer.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/witcher_3_blood_and_wine_mutagen_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/apha_pharmacy_abstract_submission.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/67655358645.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/hp_pavilion_dv5_laptop_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/deformation_of_the_crust_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/34499883305.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/xiduripadimubuj.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_off0000d410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD410 4956 bytes
SHA-256: 31c1ee575444e159c31d65844cd9fcffd5f72352df5b51a1f94f446a1aeb15ba
font_01_sfnt_off0000e4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DE 10808 bytes
SHA-256: 7a7d58940362358ebbc08207d7688745c6d7fbe0bc7db9a50646f718aade86af