Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb66faf33d82675…

MALICIOUS

PDF

78.0 KB Created: 2020-11-24 19:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0d8e393a6c3e49cf38089a5edfa0d8c4 SHA-1: 1cb1a83943c464de6e1a9952d2ea8dd0bcf62fc1 SHA-256: 8fb66faf33d82675415d6c55acb226185aec72d68e025ff6b0dc7ef9b366f12b
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 flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing site or download further malware. The document body, though heavily obfuscated, contains references to "The mandrell sisters songs" and the wkhtmltopdf application, suggesting a lure to disguise the malicious payload.

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://trafficel.ru/strik?utm_term=the+mandrell+sisters+songs PDF link annotation
    • https://xiwajuropoji.weebly.com/uploads/1/3/4/3/134371127/xitewukaxuwo.pdfIn PDF document text
    • https://nusisudarebo.weebly.com/uploads/1/3/4/3/134349377/mavebanoxej_sadubekevuwev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fada96e3dc39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f8e280f2bcfc.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f871cf7b8c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492901/normal_5fb9eb9d0fe0e.pdfIn PDF document text
    • https://pemibala.weebly.com/uploads/1/3/4/6/134620411/6372459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_5fa5983437e3a.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/6a3c2da7-dd95-4cfc-9e27-431a7c2a427c/24552648300.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/faligikexewibumafurini.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/spivak_calculus_on_manifolds_solutions.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_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 4976 bytes
SHA-256: 6c7e4c417824846d148b91e14019076306243f12d94f0f749fed9705117c7572
font_01_sfnt_off0000f8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E0 10652 bytes
SHA-256: 268113131835fec208648b734f71bbb377f8cc22ef0cd75ba911ea2d2a0982b4
font_02_sfnt_off00011d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D21 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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