Malicious PDF — malware analysis report

Static analysis result for SHA-256 941c7ddca728eae5…

MALICIOUS

PDF

75.3 KB Created: 2022-03-30 05:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 1891ee645b1ffc25dea70a7ffac68e2d SHA-1: 8b4a1ea3b2614de7ed333449cc897edebd1420b1 SHA-256: 941c7ddca728eae52977edb755cef05c6fe2659ce8ac5e8ff1924a7449a5ee4f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and numerous external URIs pointing to disposable hosting or suspicious domains. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to redirect the user to one of the listed URLs for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://yubit.co.za/YmrXLWy8?keyword=alfred%20piano%20book%201a%20pdf PDF link annotation
    • https://rulakufip.weebly.com/uploads/1/3/4/4/134489053/danugobufe.pdfIn PDF document text
    • https://zepudelewow.weebly.com/uploads/1/3/2/6/132682561/1971227.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/137590a9dec7bf9c4fd98127a27551c9/56976161271.pdfIn PDF document text
    • http://prmakeup.com/Image/files/kaliridajaxonew.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/dugib.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/97829461888.pdfIn PDF document text
    • https://wilofera.weebly.com/uploads/1/3/4/4/134488721/duxar.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/pepili.pdfIn PDF document text
    • http://studiodara.eu/userfiles/files/vigazonivajemadepiba.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/gawafeburiburopitelujef.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/77166137378.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/titazag.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/nuxudinirasekosuvil.pdfIn PDF document text
    • https://xaxunuvupewiro.weebly.com/uploads/1/3/3/9/133997201/binesosumaroke-rixuxeviwajuji-xelipidolemewo-famiwe.pdfIn PDF document text
    • https://zibamikalizofu.weebly.com/uploads/1/3/1/4/131409526/9662798.pdfIn PDF document text
    • https://kogemopisita.weebly.com/uploads/1/3/0/7/130776015/1778950.pdfIn PDF document text
    • https://zeregosuw.weebly.com/uploads/1/3/6/0/136055393/gowimubetewo.pdfIn PDF document text
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/998606.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABA3 7436 bytes
SHA-256: b0689d786e1d87ad80c3d53a2bd0caeeb42e8a0fd7f926fe8a01d91eb68c3651
font_01_sfnt_off0000c3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DC 17292 bytes
SHA-256: 492bd0179e17f4fe04b07cad3286ddd53d53a583cd7bfcca41b2ec24cd29b9d0
font_02_sfnt_off0000f12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12F 10492 bytes
SHA-256: 44beb0667c67158fc0eb18845a7b8a05fc370f9bacc2788bf6318530c3491d85
font_03_sfnt_off000108e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E6 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336

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