Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd439ef8c602bc3…

MALICIOUS

PDF

77.0 KB Created: 2021-03-23 10:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41efd650c788d33b9560b90f79b9aaef SHA-1: 703a4b792c3a4318d4d820440a99fc88a088d3d4 SHA-256: cbd439ef8c602bc3624d40db389d2a585aeebfa422ba47fff52b13179851cd2c
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://leonvi.ru/wix?keyword=realidades+2+capitulo+4a+answers` is a primary indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/wix?keyword=realidades+2+capitulo+4a+answers
    • http://disconto50.info/what_is_the_purpose_of_scientific_argumentation_brainlyr93ks.pdf
    • http://salonly.xyz/jufikigosulupul6hfgf.pdf
    • http://emmetrix.net/why_is_the_short_run_average_total_cost_curve_u-shapedea7h1.pdf
    • http://riwalimuj.scienceontheweb.net/62316218745.pdf
    • http://vexasefagi.scienceontheweb.net/nidixenebud.pdf
    • https://risovokoxenixe.weebly.com/uploads/1/3/3/9/133997247/1803a.pdf
    • http://mesanezedid.mypressonline.com/fugaraverikamo.pdf
    • http://eduha.online/17406958023iy1re.pdf
    • https://mokabeninenaji.weebly.com/uploads/1/3/4/0/134013120/sosisanisediwogoti.pdf
    • http://normal-id.com/xeruxokuz98bqe.pdf
    • http://rafale.store/how_to_niagara_falls_from_new_york_cityssa54.pdf
    • http://retamos.mygamesonline.org/86681472312.pdf
    • http://afracheat9.xyz/craftsman_208cc_snowblower_oil6qjht.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_23b8e40f17cd40f1bca15e3cbce717df.pdf?index=true
    • https://s3.amazonaws.com/widiku/63103331599.pdf
    • https://s3.amazonaws.com/gebukil/37250252533.pdf
    • http://xuvuzonixo.onlinewebshop.net/advantages_and_disadvantages_of_mobile_phones_essay.pdf
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_46f74858a2de4ac49f32f596d06e5e6f.pdf?index=true
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_d7da47a4ea364342a24856299e762422.pdf?index=true
    • https://8acf0fc4-2da8-4686-9788-d7840b5449fc.filesusr.com/ugd/fab691_c9056ec7af014de3a5c4bec0a6e43341.pdf?index=true
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_718d74af864f46bda78ec2cf1f381f53.pdf?index=true
    • https://s3.amazonaws.com/vitelitubovuluj/composition_of_blood_worksheet_answers.pdf
    • https://s3.amazonaws.com/fatikonavori/89318613738.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee48.bin
0faba4f3b536baaf8b0fb19f6e828bdc506f6b1340b40334ff8df7bd3531cc37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE48 5388 bytes
font_01_sfnt_off000100c5.bin
3a3aeb6544777f47381462cd0a8cb1b9cd9f8fec0789d9e6b041e72fbfd053c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 10756 bytes

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