Malicious PDF — malware analysis report

Static analysis result for SHA-256 69174ba752f189d2…

MALICIOUS

PDF

75.8 KB Created: 2021-10-11 22:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d8ecadca5f467b2c2f1399872c9f32b6 SHA-1: 1a62338e3a31d16c135e5662dd5aa5c17c678962 SHA-256: 69174ba752f189d2f73e8dabf115ef722720861a0114b4b605d5d5a4989bfa31
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 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.
  • 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://chcial.ru/uplcv?utm_term=arabic+simple+easy+front+hand+modern+mehndi+design PDF link annotation
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/tenibewovunirosisejimi.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/xozetaseguvovinoguta.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148e9b107efd---86162626633.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/12450307405.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143d96578edd---39394244182.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202109170954464197.pdfIn PDF document text
    • https://thietbixanh.net/uploads/files/vepijexoduv.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/38830982222.pdfIn PDF document text
    • http://bionazorat.uznature.uz/userfiles/file/zapikavobanikipesumus.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/67875851270.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/53810422575.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/wedewupotukawodogis.pdfIn PDF document text
    • http://hodori247.com/uploads/files/86076910723.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/81746022495.pdfIn PDF document text
    • https://sibconsulting.com/contents/files/94244491346.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/pusiwuwepeke.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/29766419331.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/17162997444.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/76241086662.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/31104717407.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/13837425070.pdfIn PDF document text
    • http://wwsm-hk.com/files/file/68762521701.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC747 11300 bytes
SHA-256: fde2772f655ba1966da086dcd38008593d6f48c635d11d8674b5af32efff1e0b
font_01_sfnt_off0000e140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE140 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF952 15980 bytes
SHA-256: 8d212011ae2564a28d5fe3d433f82879ec9743e63d4201d48b138a7ef98c9abc

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