Malicious PDF — malware analysis report

Static analysis result for SHA-256 044f89f19ece80ee…

MALICIOUS

PDF

74.7 KB Created: 2021-03-28 19:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5d7e0c92ae253b83834a8d8868371426 SHA-1: c054408533b77389383d78c4bbf6e633cdcb8c4d SHA-256: 044f89f19ece80eef1d1c789b9ef3fcf9dc69057d30ea03014001e07556f16c7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign-looking PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary URLs, 'https://lozipotod.ru/strik?utm_term=lista+verbos+regulares+e+irregulares+en+ingles+pdf', is flagged as unknown reputation and is likely the malicious destination. ClamAV detection and ML classification strongly indicate malicious intent, specifically related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=lista+verbos+regulares+e+irregulares+en+ingles+pdf PDF link annotation
    • https://cdn.sqhk.co/kukisigafumi/iifvhb3/63772648743.pdfIn PDF document text
    • https://rewovokikulige.weebly.com/uploads/1/3/1/3/131379935/edca719.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/ieu8Ehc/hat_tricks_menu_hamburg_ny.pdfIn PDF document text
    • https://gixunilaw.weebly.com/uploads/1/3/1/8/131856646/kusudewaditiruwowis.pdfIn PDF document text
    • https://bulodogezuso.weebly.com/uploads/1/3/4/8/134868115/pumumuzeneb.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/zifozujiwi/american_buffalo_knife_and_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a691a1-5cf2-429d-8e8c-428d8dc62581/butefoburuliduk.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/cyber_security_course_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/yii2_active_form_field_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e35910b-4ce8-4a68-a168-cc8959b62b4c/vinotidovefomunudojujuno.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/46582442459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f426cd-6c42-4921-a99e-6602cfd9aa65/fivuxewewilutuzat.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/muworisuposogasapojutog.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/47263221180.pdfIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_e40892c884e147e6884b4a559d671d3c.pdf?index=trueIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_05b95af752944d9dbb5a1ab6c3f1e07f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/8th_grade_pre_algebra_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/trio_tablets_for_sale.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_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 5352 bytes
SHA-256: c925c3effb712fdf86b8969faa75da15960dc8964d27d455e87e9aa2573907c3
font_01_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 10628 bytes
SHA-256: 8c0fc203bd1fcba3aa7c172fd3d8b00e11384bd617409ef8dcbb6171ce5f7fe0

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