Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2d8598e933bf7d…

MALICIOUS

PDF

66.3 KB Created: 2020-11-23 14:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5b9153f468439146ed8c15f87f826257 SHA-1: 2a3ccc527e504d0f94dfaa5af7034230e0ccde84 SHA-256: 1c2d8598e933bf7dfbee17fb1c0af237ea2c4be4eb901fbb245bf26741ba7117
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://traffine.ru/strik?utm_term=hot+teen+guy+porn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f8e356a0dd88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_5fa961d0bf98d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f9b846ea1700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449984/normal_5fac47a5f1827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_5fb7fb0687bc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422134/normal_5f998d60434ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5f8b567213e10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d39bcc-4893-4ca2-b4c3-96d09feeae41/gewalokilomoraxavak.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/lagu_aaliyah_massaid_ulangi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f720a625-e173-4431-b351-f9ea7498c1cd/27628513235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/281ccb9d-f74a-48cf-abc8-a558e656cc65/3557644658.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/interview_article_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/quick_fix_medina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72156c15-3d25-4d13-8852-f6af0fc64a21/gecenin_sonuna_yolculuk_zet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7c3d04-89e8-494c-8fdf-922606c9fb69/test_de_vocabulario_de_boston_laminas.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_off0000cbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAD 4632 bytes
SHA-256: 97f25a1166b85e98ba1e26d2aa9c602753897b92afa0e93d0977a8751a0623e9
font_01_sfnt_off0000db8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 9852 bytes
SHA-256: 780509ebe5616b94c3a56e388e099c27c8f73dbd511e965a761e034689c699b0

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